SOLUTION: 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 functi

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: 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 functi      Log On


   

Question 200671: 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 1.75 . See the figure below.
If the monthly bill for 17 HCF is$22.76 , what is the monthly bill for 21 HCF?


Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
$22.76/17 HCF=$1.34
($1.34)(21HCF)=$28.14