Exhibit 4-9 Price of Good X Quantity Demanded Quantity Supplied $10 220 90 11 200 100 12 180 130 13 150 150 14 120 190 15 80 260 Refer to Exhibit 4-9. Suppose that the government imposes a price ceiling at a price of $11. How many fewer units would be exchanged at the price ceiling than would be exchanged at the equilibrium price?