The table of values below shows the amount of water in a watering can and the weight of the can. Based on this information, how much does a gallon of water weigh?

Amount of Water in Can (gallons) Weight of Cans (pounds)
0 2
0.5 6.2
1 10.4
1.5 14.6
2 18.8
A
4.2 pounds

B
6.2 pounds

C
8.4 pounds

D
10.4 pounds