Help please:) 15 points

Step-by-step explanation:

15 cups of water

Step-by-step explanation:

The original recipe has 1 cup of lemon juice. If she has 2.5, you must multiply the 1 cup of lemon juice by 2.5, and everything else in the recipe by 2.5 as well. When you do that, you get:

1*2.5=2.5  = lemon juice amount

6*2.5=15   = water amount

2*2.5=5    = sugar amount

Hope this helps