Given the lines ab and cd, determine the slope of line ab. type a numerical answer in the space provided. if necessary,
use the / key to represent a fraction bar. do not put spaces in your answer.

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 graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?