The monthly cost (in dollars) of water use is a linear function of the amount of water used (in hundreds of cubic feet, hcf). the cost for using 17 hcf of water is $32.99, and the cost for using 40 hcf is $66.34. what is the cost for using 37 hcf of water?

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

Find the slope of the line passing through a pair of points

How is this equation completed? i cannot find any examples in the book.