The graph below shows the price of different numbers of swim bags at a store: A graph is shown. The values on the x axis are 0, 2, 4, 6, 8, 10. The values on the y axis are 0, 15, 30, 45, 60, and 75. Points are shown on ordered pairs 0, 0 and 2, 15 and 4, 30 and 6, 45 and 8, 60. These points are connected by a line. The label on the x axis is Number of Bags. The title on the y axis is Price in dollars.

Which equation can be used to determine p, the cost of b swim bags? (5 points)

Group of answer choices

p = 7.50 + b

b = 7.50 + p

p = 7.50b

b = 7.50p