Raspberry. Lemonade

1. 2.5
2. 5
4. 10
6. 15
Rosie is planning to make raspberry lemonade for a party. She needs to add 2 scoops of raspberry to every 5 cup of lemonade. The data table shows the ratios needed. At what ratio does the constant of proportionality appear?
A.(5, 2)
B. (1, 2.5)
C. (2.5, 1)
D. (2, 5)

To find the ratio at which the constant of proportionality appears, we need to identify the ratio of cups of lemonade to scoops of raspberry that remains constant in all the data points.

Looking at the data table, we can see that the ratio of cups of lemonade to scoops of raspberry is always 5:2. This means that for every 5 cups of lemonade, Rosie consistently adds 2 scoops of raspberry. Thus, the constant of proportionality appears at the ratio (5, 2).

Therefore, the correct answer is A. (5, 2).