Answer:
For 7 servings, you need 21 teaspoons of drink mix and 7 cups of water
For 2 servings, you need 6 teaspoons of drink mix and 2 cups of water
Explanation:
Since you need 3 teaspoons of drink mix per serving, multiply number of servings by 3 to find teaspoons of drink mix
Since you need 1 cup of water per serving, the number of servings is equal to the number of cups