Camden starts a business mowing lawns. He charges $35 per hour plus a $15 charge for gasoline. Write an equation to model Camden's total charge, y, for a job that takes x hours.
Christopher's charges for landscaping are shown in the graph below. What is Christopher's hourly rate?

If I hire Camden to mow my yard and it takes him 3 hours, how much do I owe him?
Which statement is true?