Wow. I can't believe I made a 38 in Algebra a few years ago. It's actually surprisingly easy when you study lol I went back to college and I have a A in the class now
For domain, if you have a LEFT end point meaning an open or closed circle your domain values (x-values) will be greater (open circle) or greater = (closed circle) the x-coordinate of the circle. If you have a RIGHT end point the domain values (x-values) will be less or less = that x-coord. For range, an end point at the BOTTOM/LOWER part of the graph your range y will be greater or greater = to that y-coord. An end point at the TOP means your range will be less or less= that y-coord. Make sense?
can you please make a video to find out the domain and range of a function when the function is given and you first have to sketch the graph and then find the D And R using that graph...? please in great need...
Thank you for the question. It is possible. It looks like you would have a solid (filled in circle) at the point (3,-2) and an open circle at the point (-2,5). Let me know if you have any additional questions or need clarification on this answer.
Thank you so much for making this video. I haven't really checked yet, but do you have any videos on square roots and perfect squares? If so, that would be extremely helpful!
is it possible to have something like -2 < x _< 3 and -2 _< y < 5 ? if so, what would the circles look like? * _< indicates greater/less than or equal to
If it goes on forever in one direction you would x > than the left most x-coordinate or x < the right most x-coordinate depending on if it goes to positive or negative infinity. For range you use y > the lowest y-coordinate (going to positive infinity) or y < the highest y-coordinate if going to negative infinity. Hope that helps.
Than you for asking a question. A line has a domain of all real numbers. The one exception would be a vertical line which has a domain only equal to the x-value of the vertical line itself. Lines have a range of all real numbers as well with the one exception being a horizontal line which has a range only equal to the y-value of the horizontal line itself. Hope that helps and let me know if you need more clarification.
What if you have a graph that has just points instead of a continous graph its a discrete graph? How do you find the domain and range for those types of graphs?
How can I find out the range for a polynomial if I only have the function it selfor if they give me the domain of a function , how to calculate the Range?
+Shfly cloud When working with the range of polynomials you will usually be focused on the end behavior. I have 3 videos discussing end behavior of polynomials and you can find those below. ruclips.net/video/oEP6g2l93Lg/видео.html ruclips.net/video/ZjOJQ_oHU5w/видео.html ruclips.net/video/4Byt-3nvPAo/видео.html
+MrHowardMath Thank you very much sir! I got 100% plus 10 points extra credit as we weren't taught this yet, but I knew the course material and came here for help! :D Thank you! I'll be sure to help you in return by telling my classmates all about your channel if they need any help! Thank you! ^-^
+Abhishek Tripathi Thank you for the comment. I cover this topic in the following video ruclips.net/video/3mkSYyb9oIA/видео.html and the topic you are looking for starts around 13:40 in. Let me know if that helps or if you were looking for something different.
WOW! GREAT VIDEO AND THANKS FOR THE LIFE-SAVER TOPIC FOR MY DAY! I have one question; when do you ever use this sign: > or even a line underneath the sign?
+David Huynh Thank you for the comment. You use the > sign if the values are to the right for domain or above for range. You put the line underneath the symbol when you have a filled dot at that coordinate as opposed to an open dot where you would not put the line underneath the symbol. I hope that helps.
Sorry for the delay. I just saw your comment. If you are referring to interval notation you could write the domain as (-5, infinity). Let me know if that does not answer your question.
+Samheeta Mistry Yes. If it is a line then it is a function as long as it isn't a vertical line. As long as any relation passes the vertical line test then it is a function. Another way to say this is that as long as no x-coordinates repeat with different y-coordinates then it is a function. Hope that helps.
If the graph stops at a specific point then that is the same as a filled in circle at that point. If the graph has arrow heads then it goes to either positive or negative infinity in the direction the arrow head points. Hope that helps.
Hi Mr. Math! I would like to know the purpose to know this stuff? I meant... I am over 40 years old and never ever saw anyone applying this in real life. I am learning this because I am living in Canada and I need to know this to take a Practical Nurse program.
That is a complex question and I will do my best to answer honestly. 1) Domain and range are basic building blocks of functions which are used constantly in our world even though we may not recognize or realize it. The amazing technological advances and medical breakthroughs of our lifetime would not have been possible without those responsible for these breakthroughs learning to apply mathematics in school. 2) Math helps build our brains ability to solve problems like lifting weights helps build our muscles. 3) Math in general is part of a well rounded education. My opinion is that a well rounded education allows us all to go into many different and diverse careers. Some of my students may have jobs in their future that are heavily math based while others may need to rely heavily on the communication skills learned in a language class. Others may become nurses where biology might be the most relevant high school subject for them. We need to prepare students for a wide variety of topics and challenges they may face. I am confident that while you may not have to identify domain and range values directly as a nurse you will certainly use math (determining dosages, IV drip ratios etc.). I hope that is a reasonable answer and thank you for the question. Best of luck to you as you continue your Practical Nurse Program and thank you for watching my videos.
lol he forgot to add x > -5 instead he put x > 5 XD but anyways nice video its kinda helped me out because i have a test on friday and i dont wanna fail
If the graph stops at a specific point then that is the same as a filled in circle at that point. If the graph has arrow heads then it goes to either positive or negative infinity in the direction the arrow head points. Hope that helps.
Anyone else here because your teacher isn't doing their job ? :/
me
I sped him up to 1.5 and it still sounded normal
the domain for graph 1 is x is greater than -5, not 5
How do u know which way the symbol goes
this has honestly been more helpful than my algebra teacher.
Isn't the first one x>-5 for the domain.
Yeah that’s what is correct I guess. It’s like a small error there.
Wendy Wang yes it is
Wow. I can't believe I made a 38 in Algebra a few years ago. It's actually surprisingly easy when you study lol I went back to college and I have a A in the class now
First graph x > -5
Of course
This video was so helpful, thank you for making it it tought me what the book was overcomplicating
I loved your starting drawing. It could be used to make a mini-crossword puzzle. Thanks for sharing.
please explain the "" signs im used to writing domain as (-5,infinity) and range as (8, negative infinity)
For domain, if you have a LEFT end point meaning an open or closed circle your domain values (x-values) will be greater (open circle) or greater = (closed circle) the x-coordinate of the circle. If you have a RIGHT end point the domain values (x-values) will be less or less = that x-coord. For range, an end point at the BOTTOM/LOWER part of the graph your range y will be greater or greater = to that y-coord. An end point at the TOP means your range will be less or less= that y-coord. Make sense?
Great examples, but could you use larger graph paper with numbers on the x and y axis?
Now I remember
No problem. Just list the individual x-coordinates for the domain and the individual y-coordinates for the range.
can you please make a video to find out the domain and range of a function when the function is given and you first have to sketch the graph and then find the D And R using that graph...?
please in great need...
Very good video....I was able to help my son with his homework after watching.
It's such a greatest video about Domain and Range ! It's help me a lots. Thanks for posting this :)
Thank you! This video will greatly help me on my mid-term!
mr math can you upload more videos on graphs with total explanation.plz
Thank you for the question. It is possible. It looks like you would have a solid (filled in circle) at the point (3,-2) and an open circle at the point (-2,5). Let me know if you have any additional questions or need clarification on this answer.
Thx My teacher was really lazy and she gave this as homework.Great Video
Tainted Birdeoz mine too
For the graphs which has an arrow, how to decide which sign to use? A greater than or a less than?
For range use > for values above and < for values below. For domain use > for values to the right and < for values to the left. Hope that helps.
the domain of the first gragh is x>-5
Thank you so much I had been struggeling so much with this and now I get it
Thank you for the comment. I am happy to hear the video helped.
Thank you so much for making this video. I haven't really checked yet, but do you have any videos on square roots and perfect squares? If so, that would be extremely helpful!
At 4:50 can't I put Y E R or Y is equal to all real numbers
I am happy it helped you! Thank you for the comment.
Best video tutorial ever. Thank you.
Thank you for the comment. I am happy the video helped.
When do you use the inequality signs, I don't understand when you're supposed to use the inequality signs or how they work for functions on a graph.
is it possible to have something like -2 < x _< 3 and -2 _< y < 5 ? if so, what would the circles look like?
* _< indicates greater/less than or equal to
Thanks!
I have a question, if when finding the range it stops on the 4 on both sides would the solution be:
{y| yER} ?
Please provide some additional information so that I can help answer your question.
I figured it out, thanks anyways though x3
That is awesome! Great to hear you figured it out.
Thank you so much for this video. Now I understand :) How do I go about looking for your other math videos?
thanks Mr.Howard only one more question how do u get the least X or Y domain/range if it goes on for ever btw im in algebra 1
Mr.Howard
If it goes on forever in one direction you would x > than the left most x-coordinate or x < the right most x-coordinate depending on if it goes to positive or negative infinity. For range you use y > the lowest y-coordinate (going to positive infinity) or y < the highest y-coordinate if going to negative infinity. Hope that helps.
+MrHowardMath thank u that did a lot
+MrHowardMath Are you a math teacher
Yes I am.
thank you sooo Much mr. howard this will help me on our test
Thank you! I was stuck on a question like this during a test and you explained that well! ^^
What if there is a line with both sides with arrows would the:
D: {xeR}
R: {yeR}
?
I wish you were my math teacher thank you this is sooooooooo easy
+KillerBirdGaming Thank you for those kind words. I am happy the video helped.
This video was absolutely phenomenal! Thank you so much!
+Daakid Man Thank you for the comment. I am happy the video was helpful.
Thank You Mr. HowardMath
Hey Mr.Howard, just wondering how you would find two points that would go on to infinite that is a straight line
Than you for asking a question. A line has a domain of all real numbers. The one exception would be a vertical line which has a domain only equal to the x-value of the vertical line itself. Lines have a range of all real numbers as well with the one exception being a horizontal line which has a range only equal to the y-value of the horizontal line itself. Hope that helps and let me know if you need more clarification.
You will just list the x-coordinates of each point for the domain and list the y-coordinates for the range.
For a linear graph... Can the domain and range have a resriction??
What if you have a graph that has just points instead of a continous graph its a discrete graph? How do you find the domain and range for those types of graphs?
How can I find out the range for a polynomial if I only have the function it selfor if they give me the domain of a function , how to calculate the Range?
+Shfly cloud When working with the range of polynomials you will usually be focused on the end behavior. I have 3 videos discussing end behavior of polynomials and you can find those below.
ruclips.net/video/oEP6g2l93Lg/видео.html
ruclips.net/video/ZjOJQ_oHU5w/видео.html
ruclips.net/video/4Byt-3nvPAo/видео.html
+MrHowardMath Thank you very much sir! I got 100% plus 10 points extra credit as we weren't taught this yet, but I knew the course material and came here for help! :D Thank you! I'll be sure to help you in return by telling my classmates all about your channel if they need any help! Thank you! ^-^
+Ruben Rivera Excellent Ruben! Keep up the good work.
MrHowardMath I will sir! Thank you very much for your content!
Is that the first graph Domain is greater than negative -5 ?
Let me know exactly which part you are still having trouble with and I will try to help.
sir please make a video to solve functions using graph....your videos are to much easy and pellucid to understand the concepts...plz reply sir
+Abhishek Tripathi Thank you for the comment. I cover this topic in the following video ruclips.net/video/3mkSYyb9oIA/видео.html and the topic you are looking for starts around 13:40 in.
Let me know if that helps or if you were looking for something different.
+MrHowardMath thank you sir.
I need to find out what is the range or image of a domain and what letter is used to represant the domain
How to determine the interval notation from those graph?
this was actually very helpful to me. thank you
Excellent! Thank you for the comment.
Y'all in 8th?
Sub to Pewdiepie I’m in my freshman year
6th
Yeah :)
@@katelynnmorris5119 freshmen
Do you know how to find the domain and range of a shape on a graph? im having trouble with that..
WOW! GREAT VIDEO AND THANKS FOR THE LIFE-SAVER TOPIC FOR MY DAY! I have one question; when do you ever use this sign: > or even a line underneath the sign?
+David Huynh Thank you for the comment. You use the > sign if the values are to the right for domain or above for range. You put the line underneath the symbol when you have a filled dot at that coordinate as opposed to an open dot where you would not put the line underneath the symbol. I hope that helps.
thank you very much helped me with my homework
thanks Mr Howard, this was a great explanation!
Why is the first one < or equal to 6 when the graph terminates at 6. Shouldnt it be greater than or equal to 6
In your 1st graph how would we write it in the form of x belongs to then minus plus infinity etc
Sorry for the delay. I just saw your comment. If you are referring to interval notation you could write the domain as (-5, infinity). Let me know if that does not answer your question.
How do you know if the x or y is greater or lesser?
I don't get the first answer. Wouldn't the domain be x > -5? Reply.
If both ends are arrows, wont it go on forever as the domain? But, what would be the range?
Maybe -infinity to +infinity?
I think it would be, but I'm only in 6th grade... so yeah, I think I'm pretty over accelerated in math for someone at my age though :P
I was taking Algebra I in 7th grade and I was just confused. Thank you though!
Jade SmashU Yw :)
Excellent!!. Thanks for your time.
Thanks, this was really helpful.
Excellent. I am happy the video helped.
Wow I finally get this!! Thank you! But what's the difference when there's a lot more lines I guess in the graph
why do you put greater than and not less than since it's a negative coordinate
The sign of the coordinate involved does not affect the inequality symbol that you use. Hope that helps.
for the 4th problem what would it be if the circles were open instead of closed?
+deathxdestroyer This would only change the symbols so Domain -7
I dont understand can someone please explain?
Thank you very much! Your explanation is super clear!!
Thank you for the comment. I am happy the video was helpful.
MrHowardMath okay i have a question. what do i do when the line on the graph is in a v pointing downwards but the ends of the lines are infinite?
If the line contains one open hole and one closed hole, is it still a function?
+Samheeta Mistry Yes. If it is a line then it is a function as long as it isn't a vertical line. As long as any relation passes the vertical line test then it is a function. Another way to say this is that as long as no x-coordinates repeat with different y-coordinates then it is a function. Hope that helps.
How do you know which way the inequality faces?
I don't get how to write domain and range
Um wouldn't the first one be -5?
You are correct. Note is in description of video.
Thank you very much it helped me a lot.
Great video.Thanks.Helped me a lot.
Excellent! Thank you for the comment.
it really helped me, Thank you so much
I wish there was a example with a never ending amount for either because that is what I'm having problems with.
Youre amazing thank you for saving my marks
+Reena Ram Happy to hear the video helped. Thank you for the comment.
Isn't it supposed to be x>-5
gohan wanabe that's what I was thinking too 🤔💗
confusing but good work
i just seen half video and i got it good haa
I have a test tomorrow but my graphs don't have open or closed circles at the end ????
If the graph stops at a specific point then that is the same as a filled in circle at that point. If the graph has arrow heads then it goes to either positive or negative infinity in the direction the arrow head points. Hope that helps.
Helped so much thank you
good!,..nice explanation!,.,.. MrHowardMath :D
For the first graph, why isn't it -5?
Can't you write the answer with brackets or parentheses instead of the inequality signs
Thanks from Washington
Hi Mr. Math! I would like to know the purpose to know this stuff? I meant... I am over 40 years old and never ever saw anyone applying this in real life. I am learning this because I am living in Canada and I need to know this to take a Practical Nurse program.
That is a complex question and I will do my best to answer honestly. 1) Domain and range are basic building blocks of functions which are used constantly in our world even though we may not recognize or realize it. The amazing technological advances and medical breakthroughs of our lifetime would not have been possible without those responsible for these breakthroughs learning to apply mathematics in school. 2) Math helps build our brains ability to solve problems like lifting weights helps build our muscles. 3) Math in general is part of a well rounded education. My opinion is that a well rounded education allows us all to go into many different and diverse careers. Some of my students may have jobs in their future that are heavily math based while others may need to rely heavily on the communication skills learned in a language class. Others may become nurses where biology might be the most relevant high school subject for them. We need to prepare students for a wide variety of topics and challenges they may face. I am confident that while you may not have to identify domain and range values directly as a nurse you will certainly use math (determining dosages, IV drip ratios etc.). I hope that is a reasonable answer and thank you for the question. Best of luck to you as you continue your Practical Nurse Program and thank you for watching my videos.
I'M SO CONFUSED!!! D;
Good, very good ,very good video
Isn't the first one x>-5 instead of x>5?
+Juliana Araque You are correct. Video has a caption correcting this and I added an update to the description as well. Thanks for watching.
I know right?
vidoe real helped me understand
Excellent. Thank you for the comment.
Now i get it!!!thank you!!!
lol he forgot to add x > -5 instead he put x > 5 XD but anyways nice video its kinda helped me out because i have a test on friday and i dont wanna fail
+Shifat Mahmud It is great that the video helped and great that you noticed the mistake. That means you know the material. Awesome!
what if there is no end points?
If the graph stops at a specific point then that is the same as a filled in circle at that point. If the graph has arrow heads then it goes to either positive or negative infinity in the direction the arrow head points. Hope that helps.
Thanks helped me Alot!!!!!!!!!!!!
Happy the video helped! Thank you for the comment.
dude, thank you so much, i cannot tell you how thankful i am.
good video
Sir, u forgot to put a negative on five?
You are correct. Note is in description of video.
Who's here for ms monge????
Excellent!
Did you make a mistake in the second problem?