The diagram shows the proportional relationship between the number of cheese slices and the number of tomato slices a restaurant uses in a pasta recipe.

What is the constant of proportionality in terms of tomato slices per slice of cheese?
A.
6
B.
4
C.
0.25
D.
0.17

C. 0.25

Explanation: The constant of proportionality can be found by dividing the number of tomato slices by the number of cheese slices. In this case, 2 tomato slices / 8 cheese slices = 0.25.