chapter 10 cost accounting

Can you explain Contract 2: $35 for the day plus $0.10 per mile traveled (how to plug the point in the graphics step by step since it needs to be done on a computer )

10-Identifying variable-, fixed-, and mixed-cost functions. The Rolling Hills Corporation operates car rental agencies at more than 20 airports. Customers can choose from one of three contracts for car rentals of 1 day or less:

Contract 1: $55 for the day

Contract 2: $35 for the day plus $0.10 per mile traveled

Contract 3: $1.10 per mile traveles

1.) Express each contract as a linear cost function of the form y=a+bX.

Contract 2: $35 for the day plus $0.10 per mile traveled

2.) Identify each contract as a variable-, fixed-, or mixed-cost function.

Contract 3: $1.10 per mile traveles

Click the graph, choose a tool in the palette and f