Water is being added to a pool. The height of the water is the pool is 4 feet when the Water is first turned on. After 6 minutes, the height of the water is 7 feet. Which equation describes the height of the water in the pool?
A.) y = 1/2 + 4
B.) y = 7/6 + 4
C.) y= 7/6 - 4
D.) y = 1/2 - 4