Central High School had fifteen members on their swim team in 2010. Over the next several years, the team increased by an average of 20 members per year. The same school had 45 members in their chorus in 2010. The chorus saw an increase of 5 members per year.

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?