Produce a Rule for the Function Whose Graph Is Shown

Produce a rule for the function whose graph is shown.
-A math tutor makes $15.00 per hour in the tutoring lab at her school. During final exam week, she earns overtime at $22.50 per hour for the work exceeding her normal 40-hr work week. Which
Graph best depicts her total salary for the week as a function of the number of hours worked?

A)

B)

C)

D)