A truck rental company charges a rental fee in addition to a charge of per mile driven. Graph the linear function relating the total cost of the rental in dollars, , to the number of miles driven, , on the axes below.

a. If the truck is driven 0 miles, what is the cost to the customer? How is this shown on the graph?

b. What is the rate of change that relates cost to number of miles driven? Explain what it means within the context of the problem.

c. On the axes given, sketch the graph of the linear function that relates C to m.

d. Write the equation of the linear function that models the relationship between number of miles driven and total rental cost.