An electrician uses the function f (x) = 60 + 40x to calculate the total cost, in dollars, for a service call that takes x hours to complete. What does the coefficient 40 represent?

A) The electrician works 40 hours.

B) The electrician charges $40 per hour.

C) The electrician drives 40 miles to work.

D) The electrician charges a $40 trip charge.

B I'm pretty sure because none of the others seem to answer the question

B) The electrician charges $40 per hour.

Step-by-step explanation:

From the question, we were being told that An electrician uses the function

f (x) = 60 + 40x

to calculate the total cost (in dollars) for a service call which takes x hours to complete.

It means that the electrician charges a service call fee of $60 plus $40 per hour, the x represents the number of each hour he charges the extra $40