The Following Are the Equations for the Supply and Demand

Multiple Choice

The following are the equations for the supply and demand curves in the market for weezils:
where Q _d is the quantity demanded, Q _s is the quantity supplied, and P is the price per weezil in dollars.
Refer to Exhibit 4-1. If consumers decide that they want 20 percent fewer weezils at every price, the equation for the new demand curve for weezils will be

A) Q _d = 20 − 1.6P.
B) Q _d = 0.2(20 − 2P) .
C) Q _d = 0.8(20 − 2P) .
D) Q _d = 80(20 − 2P) .