Suppose that a household's monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, HCF). When graphed, the function gives a line with a slope of 1.45. See the figure below.

If the monthly cost for 22 HCF is $45.78, what is the monthly cost for 19 HCF?

Suppose that a households monthly water bill in dollars is a linear function of the amount of water the household uses in hundreds of cubic feet HCF When graphe class=