AP Precalculus 2024 Free Response Question 2 Solutions & Answers

In this video I explain the solutions to the 2nd free response question on the 2024 AP Precalculus Exam.
The 2024 AP Precalculus Free Response Question in this video came from college board website
apcentral.coll...

[@jadonwilson6094]

for B ii i got a rounded answer of 59.8 since i used the 0.396 and x that by 50 and added the 40 after

[@trxditions1835]

I kept everything in the thousands for the first part, do you think I got it wrong?

[@mporinchak]

Will have to wait until the official scoring rubric comes out. Should be ok

[@gavineisen3597]

You can use the calculator to find A and B. You just have to add plus one to the input values that you put in the calculator

[@davidwellman6422]

Part C states that the sales decreased. It does not mention the linear model at all. I believe your answer does not actually answer what the question was asking. Since the logarithmic model increases without bound, and what really happens after t=91 is that they decrease, the error will only grow each day, as the residual (actual-predicted) will grow. Again, the linear is not mentioned in part C at all.

[@mporinchak]

You are correct. I believe I read the question wrong or over thought it when I first read it. Way simpler than I made it. The function is increasing yet in reality the sales drop after t = 91 so that is why the error grows. Thanks for the feedback

[@cedricfrench503]

@@mporinchak Your videos are great. You might want to update part C. Some people might be confused if they didn't read the comments below. Thanks for all your hard work.

[@dyeung26]

For B iii, I just said that the G model was logarithmic and concave down, is that enough?

[@rafaeldavis-lumsden4379]

What if I kept everything in thousands

[@mporinchak]

you should be ok

[@davidwellman6422]

The problem even said to give answer in thousands.