Compute the price elasticity of demand at each points above.

Question 4 (Price elasticity of demand) Price Quantity Total Expenditures $100 0 $0 Price 100 P = 100 - (1/2)Q 80 40 3,200 60 80 4,800 80 50 100 5,000 60 40 120 4,800 50 20 160 3,200 40 0 200 0 20 Demand 40 80 100120 160 200 Quantity of CD players per week Compute the price elasticity of demand at each points above