Evaluating Functions (basics)

Five worked-out examples demonstrating the basics of evaluating functions at a given value. For example: find f(2) when f(x) = 3x + 1. Be sure to pay attention to the last example, which is a classic trouble-spot for algebra students (double negative).
Recorded with ScreenFlow, Acorn, and a Wacom tablet.

[@sweetflux2712]

Online classes anyone?

[@unicornwolfninja5492]

Yeah 😔

[@nickioutsoldurfavvs943]

😔i’m failing😔

[@KrispyRice419]

Me

[@aguilar_s2671]

me

[@ytlumana3x138]

8th grade honors 😔

[@Dhabzjxi]

Thank you so much! I understand functions now and I realised how easy it really was. Now, I don't have to worry about my Algebra 1 quiz! Thank you!

[@theslushdiaries4535]

you are the only reason i will pass my test tomorrow. If you ever come here, the lunch is on me.

[@jerrytamag]

ARMYY!

[@theslushdiaries4535]

@@jerrytamag yo armyyy

[@dannyboi024]

The only thing I need to evaluate is why I'm existing in an era where we do useless math for 10 years of our lives 😎

[@dumbidiot1119]

This is actually used in the real world. For money and stuff :)

[@whyanimations4437]

Barely used

[@TechReviewTom]

Well you need to pass math In college and you need a degree to do just about anything

[@acevseveryone]

@@dumbidiot1119 never seen or heard of it

[@sugarandcharlieplayz1070]

@@dumbidiot1119 when would you use functions irl give me an example

[@jonminchala7368]

Where did you get 5 like tf

[@tjpascua3139]

It's the example x=5

[@wendymorales5878]

Jon Minchala that’s what I sed but then I got it it’s an example

[@ioteess8956]

ME RIGHT NOW... like?!

[@Prayeveryday99.]

😭

[@ryanwilson8677]

It’s an example, any input is a correct input so he just picked a random number and since only 5.1 percent of the populations chances are that it was a random pick and it wasn’t subject to numerical prejudice.

[@IsJdog911]

Amazing explanation the colors really help me understand this a whole lot better, seeing as I'm so right brain. Thanks alot

[@nathangod3948]

Wait how did he get the 5

[@brkins.607]

2 years later but he made up the number if u already learned this happy for you but he just made up the number

[@chikachyk2911]

You don't. It's what you put there if the Test says something like. Find F(7) find X. Then you put the 7 in the parentheses. It depends on what the Test says . That's how you get the numbers there. I hope I'm clear

[@c0mbozz353]

Thanks so much I have a test coming up and I slept through this lesson.

[@lz0347]

Thanks, i was confused on our online lessons and i watched this and now im relieved

[@gogoanime542]

thanks for giving us straight to the point answers!

[@cesar-lf1jw]

These are easy for me but when they start putting in root squares and fractions my brain goes poop

[@3badthebad]

Saaame bruh

[@HelloKitty60621]

please explain how to do them in simple terms for me

[@ryanwilson8677]

Same it’s not fair the teachers always teach us the easy questions but then they give us the hard questions

[@ShadiSenpai]

thanks for the help its really making me advanced in class

[@EternityWolf]

thank you so much i didnt know if it was just that or if you had to do something else with f

[@chasekacher8116]

how did you get 3 to plug in on the 3rd example?

[@Sara3346]

Is there such a thing as a wrong input?

[@melodypride7343]

How did he get the 5 at 1:20

[@arvid8734]

I need help, My teacher put the x at the very back, and i don't know if i should multiply first then calculate or i should calculate then multiply and then calculate.
For ex:
x=3
f(x) 9 - 6x
f(3) 9 - 6(3)
Should i do 9 - 6 first? Or should i do 6(3) first?

[@alexanderharding5713]

What is the value of f(x) when x = -3?

[@birdie1771]

F(-3)

[@suhiadawants2721]

Where did u get the 5 from

[@sayerdragneel9631]

WERE DID HE GET THE 5 OR I JUST DID NOT LISTEN ?

[@sayerdragneel9631]

NEVER MIND

[@HelloKitty60621]

@@sayerdragneel9631 NO WHERE IS IT

[@p_jammed]

THANK YOU SOOOO MUCH U REALLY HELPED ME UNDERSTAND ON HOW TO SOLVE EVALUATING FUNCTIONS!😁

[@elgebar7337]

thank you i understand it better now

[@lemuelcastillano7913]

Hi! can i attach the youtube link of your video to the self-learning modules of out department in order for the students to learn more from the contents of this video aside from the modules that will be distributed to them? Thanks a lot.

[@kinangeagle133]

What about 4g(x)-6=-2(1/3x+4)?

[@jihohsrz3039]

Shouldn't we apply pemdas on 9-6+5 ? Like instead of 8 we gonna get 2

[@sydneysiguin6451]

No. Addition and subtraction have the same value so if you encounter questions like this always answer from left to right. I know I'm late better than never tho.

[@heatherflores4600]

thank you this really helped me to understand this better.

[@zombiedestroyerd1454]

Can you add any number to x

[@lamaripiazza5226]

Where did you get 5 from.

[@tjpascua3139]

The example

[@dauntebrown9757]

where did he get 5 from on the first example

[@crystalmccune9239]

I understand how to do this after watching part of this video, but I don't understand where you're getting the number from.

[@ms.robinson8252]

Thank so much sir you are heaven sent 😊

[@maniclangjohnnairoa.8445]

If f(x)= 4x^2-5x+3 evaluate the following:
f(5)
what's the answer?

[@ziezitci]

=4(5)²-5(5)+3
=4(25)-25+3
=100-25+3
f(5)=78

[@SooyeonIdle]

But how did you get 5 in the first equation!?

[@brkins.607]

He made it up don’t worry bout it LOL

[@geraldineespinal1332]

Im still confused WHERE DID THE 5 COME FROM

[@dirtydandan3652]

Thankyou so much mrwoeS, THIS HELPEDN ALOT 2021 9/20/21

[@juliusgutierrez1646]

A BIG THANKS TO YOU SIR!

[@b4yonce]

Where did the 3 came from

[@darwinfromjupiter5817]

Thankyou you save my little brain

[@unejsakoci9001]

You are amazing.Thanks!

[@BeenLiz]

thank u so much

[@mwuahchiloo9092]

How do you find what the input is😭😭

[@eksdi7420]

Thanks a lot man!

[@Jerseyyeditz]

thank you this helped a lot!

[@jemaalao1199]

how about " 4f(-2)+ 5f(1) "

[@muneca8769]

First of all where the hell did you get the 5 from 🤔 Im already lost

[@808mula]

great video

[@wakchannel9307]

Thank u sir😘

[@julietabalmaceda2780]

Thank you sir

[@urgfive5038]

thank you

[@ZaBaoi]

tysm

[@ecksdee4305]

Thank you SO MUCH

[@jerryspringer228]

Lol ....the 5 is what he's using to show I how to do functions..u can put any number u want where the x is next to f...

[@TungstenTater]

Epic donut man moment

[@mikeyh6555]

What about f(x)=4

[@mikeyh6555]

Not f(4)

[@mathematicaATD]

Nice

[@evilyncraft3592]

where the freak did u get 5 from

[@JessicaFlores-xx3wu]

Yassss my question!!!

[@seaaniiee9081]

It's given. You can replace it anything what the teacher/prof gives you.

[@yznugt2587]

Its a fucking example dumb nigga

[@Violettahh]

Mclean YT LMAOO

[@ryanwilson8677]

Anyone here studying for sat/act

[@ryanwilson8677]

Lol am lit going in to do the sat now

[@luminouslite5268]

F(3) = 9 - 6 + 5
F(3) = 9 - 11
F(3) = (-2)
Right?

[@rikitiu369]

Where is 6 from? There should be a variable in which the 3 can be substituted to

[@luminouslite5268]

Riki Tiu
6 is from -2(3)
And I used pemdas
That's why I got the answer of (-2)

[@alyssa8658]

ikr that's what I got I thought we were supposed to use PEMDAS

[@kassandramcpherson2839]

Addition and subtraction are equal in the PEMDAS order. So when you have both, you simply go left to right. So it’s 9-6=3, then 3+5=8

[@jonathanmelton1312]

Thank you so much

[@SophiaLikakis]

I'm still confused

[@zaras.64]

Sophia Likakis
I so agree with you. I have no clue where is he getting f2 or f3 from??!! Am very lost and confused 😐 🤷🏻‍♀️

[@kevinjonescruz613]

its a given
for example f(x)=2x+1,where f(X) is 1
f(x)=2x+1
=2(1)+1
=2+1
=3

[@jillsmith9418]

Omg i understand because of your comment thx so so much

[@bombom34gaming42]

Bulok mana imong math

[@Taquero-lo1bl]

thank you