Microeconomics 1st Edition by Dean Karlan,Jonathan Morduch

Exercise 9

The entrance fee at your local amusement park is $20 for the day. The entrance fee includes all rides except roller coasters. Roller coasters cost an extra $2 per ride.a. Write an equation that represents how much money you will spend on rides as a function of the number of rides you go on: S 5 total spending on rides; Q 5 the quantity of roller coaster rides.
b. What is your total spending on rides if you ride 4 roller coasters?
c. Draw a graph of the relationship between total spending on rides and the number of roller coaster rides.
d. Redraw the graph from part (c) to show what changes if the entrance fee increases to $25.
e. Rewrite the equation from part (a) to incorporate the increased entrance fee of $25.
f. After the entrance fee increases to $25, what is your total spending on rides if you ride 4 roller coasters?