The Bridgeport water department has a monthly service charge of $12.90 and a usage charge of $1.57 for every 100 cubic feet of water. Which of the following equations can be used to determine the mont

The Bridgeport water department has a monthly service charge of $12.90 and a usage charge of $1.57 for every 100 cubic feet of water. Which of the following equations can be used to determine the monthly water bill of a Bridgeport resident? (Let x represent the amount of water used in hundreds of cubic feet and y represent the monthly cost.)

A.

y = 1.57x + 12.90

B.

y = 1.57x - 12.90

C.

y = 14.47x

D.

y = 0.0157x + 12.90