A rental company rents a piece of equipment for a $60.00 flat fee plus an hourly fee of $5.00 per hour.

a. Make a chart showing the number of hours the equipment is rented and the cost for renting the equipment for 2 hours, 5 hours, 10 hours, and t hours of time.

b. Write an algebraic expression representing the cost y as a function of the number of hours t. Assume t can be measured to any decimal portion of an hour. (In other words, assume t is any nonnegative real number.)

c. Graph the expression from part (b).

d. Use the graph to approximate, to two decimal places, the number of hours the equipment was rented if the bill is $216.25 (before taxes).