The bridgeport water department has a monthly service charge of $12.30 and a usage charge of $1.59 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 = 1.59x - 12.30
b. y = 1.59x + 12.30
c. y = 13.89x
d. y = 0.0159x + 12.30