Question

A website charges $3 for each movie you download. They also charge a one-time sign-up fee of $14.99.

What is the input variable?

Answer 1

the 3 dollars

Explanation:

the 14.99 is a one time fee and you get charged 3 dollars for every single movie you're downloading do it the only one changing.

Answer 2

The Input variable is the number of movies (m)

Explanation:

This is because the input variable is the one that can most easily controlled and the initial cost of the sign up fee and the cost of movies doesn't change, and we don't know the total cost, but we can always change the number of movies to get a different output leaving the movies to be the input. Hope this helps a little bit.