Use the table to answer the question.
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 cups of lemonade. The data table shows the ratios needed. At what ratio does the constant of proportionality appear?
(1 point)
Responses

(1, 2.5)
left parenthesis 1 comma 2.5 right parenthesis

(5, 2)
left parenthesis 5 comma 2 right parenthesis

(2.5, 1)
left parenthesis 2.5 comma 1 right parenthesis

(2, 5)