Figure 4-4 A graph of price, P, versus quantity, Q, is a supply curve consisting of a straight line rising to the right from the origin. Two points, A and B, are plotted. Point A is at (Q, P), and Point B is at (Q prime, P prime), where Q prime is greater than Q, and P prime is greater than P. Refer to Figure 4-4. The movement from point A to point B on the graph is called a. a decrease in supply. b. an increase in the quantity supplied. c. a decrease in the quantity supplied. d. an increase in supply