Each point on a ________ curve shows the willingness of consumers to purchase a product at different prices

Joan can make and bottle 8 smoothies an hour. If she works with a friend, they can make and bottle 18 smoothies an hour. What is the marginal product of labor?

(A) 26 (B) 9 (C) 2 (D) 10

A perfectly elastic supply curve

a. has an elasticity of 1 b. has an elasticity less than 1 c. has an elasticity of 0 d. is horizontal e. is upward sloping