Question

The A+ Cell Company charges $40 per month and $0.30 per minute for each additional minute over 500 minutes. The cost can be written as a linear function, C(x)=0.3x+40, where x is the number of minutes over 500. If the company were to increase the $40 charge to $50, how would the graph of this function change?

The graph will move _____ units.

answers are: up 10, down 10, left .10, right .10

Answer 1

up 10

Explanation:

The function would change from

C(x) = 0.3x + 40

to

C(x) = 0.3x + 50

The change is only to the y-intercept, so the graph of the function will move up 10.