The graph shows the amount of money paid when purchasing bags of caramel corn at the zoo: A graph is shown. The x-axis is labeled from 0 to 12 and the y-axis is labeled from 0 to 12. The four points are shown on the graph are on ordered pairs 0, 0 and 1, 3 and 2, 6 and 3, 9. These points are joined by a line. The label on the x-axis is Bags of caramel corn. The title on the y-axis is Total cost in dollars.

Write an equation to represent the relationship between the total cost (y) and the number of bags of caramel corn (x). (4 points)

Group of answer choices

y = one-third x

y = 2x

y = one-half x

y = 3x