The monthly cost (in dollars) of water use is a linear function of the amount of water used (in hundreds of cubic feet, HCF).

Question

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 15 HOF of water is $39.57, and the cost for using 33 HOF is $71.07. What is the cost for using 19 HOF of water?

Kunduz · Accepted Answer

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