Answer:
the constant of proportionality is 5/2.
Explanation:
The constant of proportionality that relates the number of cups of cereal, y, to the number of cups of pretzel sticks, x is y= 5/2x. We have a snack mix recipe that calls for 10 cups of cereal and 4 cups of pretzel sticks. Thus, the constant of proportionality is 5/2.