Question

When Stephanie was 13 years old she had 137 baseball cards. Each year for her birthday she got 25 more. This can be modeled by the function c(x) = 25x + 137 What does the variable x represent?

A: the number of cards added per year
B: the number of cards collected by the time Stephanie was 13
C: the total number of cards in the collection
D: the number of birthdays Stephanie has after her 13th.

Answer 1

The answer is actually A. Since x could vary. Therefore, if the year after her 13th birthday is 6, x would be 6.

Answer 2

I am pretty sure it is D.

Explanation:

Hope this helped :)