A smoothie recipe calls for 2 cups of juice for every 3 cups of strawberries. How many cups of strawberries would you need for 9 cups of juice?

Now, use the double number line to find the number of cups of strawberries you would need for 9 cups of juice.

Juice (cups)

0

1

2

9

Strawberries (cups)

0

121​

3

Based on the given ratio, for 9 cups of juice, you would need 9 cups of juice / 2 cups of juice = 4.5 times the amount of strawberries.

So, 3 cups of strawberries x 4.5 = 13.5 cups of strawberries.

Therefore, you would need 13.5 cups of strawberries for 9 cups of juice.