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 9. The y-axis is labeled from 0 to 10. Four points are shown on the graph 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.

What does the point (0, 0) on the graph represent? (4 points)

a
The cost of zero bags of caramel corn

b
The cost of one bag of caramel corn

c
The cost of two bags of caramel corn

d
The cost of three bags of caramel corn