The graph shows the amount of money paid when purchasing bags of candy at the zoo:
A graph is shown. The x-axis is labeled from 0 to 9 and the y-axis is labeled from 0 to 10. The four points shown on the graph are ordered pairs 0, 0 and 1, 2 and 2, 4 and 3, 6. These points are joined by a line. The label on the x-axis is Bags of candy. The title on the y-axis is Total cost in dollars.
What is the constant of proportionality? (4 points)
one-half
three-fourths
1
2
The constant of proportionality can be calculated by dividing the change in the y-values by the change in the x-values.
In this case, the change in the y-values is 6 (from 0 to 6) and the change in the x-values is 3 (from 0 to 3).
So, the constant of proportionality is 6/3 = 2.
Therefore, the correct answer is 2.