Question

A car repair company charges a $15 fee for an evaluation plus an hourly rate for any services required. What is the hourly charge for services? (Hint: the hourly charge is the slope)

Answer 1

If the fixed cost is $15, it is able to be removed from the two-hour charge to give the charge of ONLY the two hours, which is $150.

This means the hourly charge is $150÷2, which is $75