Consumer Surplus: Equations. Eric Cartman likes to rent computer games on DVDs from a local
Blockbuster outlet in South Park. Cartman's DVD rental demand curve can be written:
QD = 5 - 0.2P
where QD is the number of DVD rentals and P is the rental price per month.
A. Plot Cartman's DVD rental demand curve, using price as a function of the quantity demanded.
B. Use the demand curve to help you calculate the number of DVDs rented per month and the amount of consumer surplus derived at a rental price of $5.