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 1.35. See the figure below. If the monthly cost for 24 HCF is $48.69, what is the monthly cost for 30 HCF? Monthly cost dollars) 48.69 24 Water usage (in HCF) $0 X S