Jonah is making lemonade. He uses 2 cups of water for every 1 cup of mix. Why does the relationship between the number of cups of mix and the number of cups of water represent a function?
A. For every cup of water, 2 cups of mix are added. The number of cups of mix is paired with only one value for the number of cups of water.
B. For every cup of mix, 2 cups of water are added. The number of cups of mix is paired with only one value for the number of cups of water.
C. For every cup of mix, a cup of water is added. The number of cups of mix is paired with only one value for the number of cups of water.
D. For every cup of water, a cup of mix is added. The number of cups of water is paired with only one value for the number of cups of water.