Question

A computer repair company charges an initial fee plus $40 per hour for repair work. The total cost for 3 hours of work is $150. Assume the relationship is linear. Find and interpret the rate of change and the

initial value.

Answer 1

Rate of change = 40

Initial value = 30

Explanation:

150 = 3(40) + b

b = 30

I created this equation to mean 150 is the total which comes from 40 per hour (in this case it was 3), and I got the b to equal 30.

The equation shows that the rate of change is 40 and the initial value is 30.