Val is planning to make fruit punch for his birthday sleepover. He needs to add 2 scoops of fruit punch mix for every 8 cups of water. The data table shows the ratios needed. At what ratio does the constant of proportionality appear?

Fruit Punch Mix: 1, 2, 4, 6
Water: 4, 8, 16, 24

(2, 8) (8, 2) (1, 4) (24, 6)

The ratio of Fruit Punch Mix to Water is:

1:4
2:8
4:16
6:24

From these ratios, we can see that for every unit increase in Fruit Punch Mix, there is a corresponding increase of 4 units in the amount of Water.

Therefore, the constant of proportionality is 4, which appears in the ratio (2, 8).