Jackson’s car was making a rumbling noise for two weeks. He decided to take it to the mechanic to get it checked out. To diagnose the problem, the mechanic tells Jackson that he charges a flat fee of $60 and $35 for each hour he spends trying to identify the problem.



A. Write a linear equation in ​y = mx+b​ form to represent the cost of getting Jackson’s car diagnosed.

B. Identify the slope and y-intercept, and what they mean in the context of the story.

C. Does this situation represent a proportional relationship? Why or why not?