Allison is making lemonade for her lemonade stand. She likes the mixture of 5 parts of water to 2 parts of lemon juice. If she wants a total of 28 cups of lemonade, how many cups of lemon juice does she need?

8 cups of lemon juice

Step-by-step explanation:

28 / 7 = 4

5:2 * 4 = 20:8

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)