A community center charges an hourly rate plus a one-time registration fee for swimming lessons. The graph below shows the total amount charged for different numbers of hours of swimming lessons. Part

A community center charges an hourly rate plus a one-time registration fee for swimming lessons. The graph below shows the total amount charged for different numbers of hours of swimming lessons.

Part A: Write an equation that represents the relationship between x. the number of hours of swimming lessons, and y the total amount charged.

Part B: What is the y-intercept of the equation you wrote in Part A? Explain what it represents.