K Use the price-demand equation x = f(p)=√552-8p to find the values of p for which demand is elastic and the values for which demand is inelastic. Assume that price and demand are both positive.

If a decrease in the price of movie tickets increases the total revenue of movie theaters, this is evidence that demand is a. price elastic. b. price inelastic. c. unit elastic with respect to price. d. perfectly inelastic.

The price elasticity of demand for personal computers is estimated to be 2.2. If the price of personal computers declines by 20 percent, what will be the expected percentage increase in the quantity of computers sold?

Prove that price elasticity of demand is not the same as the slope of a demand curve.