The ratio table below describes the relationship between grapes and blueberries in a fruit salad.

Fruit Salad
Grapes
(cups)
Blueberries
(cups)
2
0.5
6
1.5
20
5
24
6

Mandie is making 15 cups of fruit salad. What ratio of grapes to blueberries should she use?
9:6
10:5
12:3
14:1