Finding inputs and outputs of two-step function that models a real-world situation: Two variable equation

Question

a plumber charges a flat fee of $74 to visit a home and examine a clogged drain. The plumber charges an additional $22 per hour spent fixing the drain. The totally cost, C (in dollars), for fixing a drain that takes h hours is given by the following.

C=74 + 22h

Answer 1

That is the correct function