Exhibit 5-7 Demand curve for concert tickets The graph shows a demand curve for computers. The horizontal axis measures quantity of tickets per concert and the vertical axis measures price per ticket in dollars. The horizontal and vertical axes range from 0 to 40 in intervals of 10. The demand curve passes through points (20, 40) and (30, 10). According to Exhibit 5-7, the demand for concert tickets between the prices of $10 and $40 is: a. perfectly elastic. b. inelastic. c. elastic. d. unitary elastic