Question

The function f(x) = 7x + 15 models the time in minutes that a customer will wait to get an oil change if there are x cars in line.

How long will a customer wait if they are the fifth car in the line?
A) 28 minutes
B) 35 minutes
C 43 minutes
D) 50 minutes

Answer 1

D 50 minutes

Explanation:

If the customer is the fifth car in line then x = 5, so

f(5) = 7(5) + 15

f(5) = 35 +15

f(5) = 50