Help me answer this problem?

Question

The Hagel car rental agency charges $30.00 per day and $0.25 per mile.

a. Find an equation relating the cost C of renting a car from Hagel for a one-day trip covering x miles.

b. Draw the graph of the equation in part (a).

c. How much does it cost to rent the car for one day covering 60 miles?

d. How many miles were driven if the one-day rental cost was $47.75?

Answer 1

A C(x) = 30+0.25x

or C = 30+x/4

B The graph is a straight line with slope = 0.25 = 1/4

and y intercept = 30

C C(60) = 30 + 60/4 = 30+15 = $45

D 47.75 = 30 +x/4

x/4 = 17.75

x = 71 miles