Question

Apex Plumbing charges a service call fee of $55, plus $15 for each hour of service. John wrote a linear function using t, the total cost of a service call, as a function of h, the number of hours the service call lasted.

Use the coordinate grid to graph John’s function, t(h).



What is the value of the slope in his equation and what does it represent?

A
The slope is 15, and the slope represents the number of hours of service.
B
The slope is 55, and the slope represents the service charge fee.
C
The slope is 15, and the slope represents the rate charged per hour of service.
D
The slope is 55, and the slope represents the rate charged per hour of service.

Answer 1

Equation: t(h) = 15h + 55. The slope is 15 and it represents the rate charged per hour of service. (Answer: C)