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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 13 HCF of water is
$34.58, and the cost for using 24 HCF is $53.83. What is the cost for using 19 HCF of water?

Respuesta :

10011813

Answer:

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

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The cost for using 28 HCF of water is 39.49, and the cost for using 47 HCF is 65.14.

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You have 2 points: (28,39.49) and (47,65.14)

slope = (65.14-39.49)/(47-28) = 1.35

y = mx+b

39.49 = 1.35*28 + b

b = 1.69

Step-by-step explanation:

C(x) = 1.35x + 1.69

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What is the cost for using 32 HCF of water?

C(32) = 1.35*32 + 1.69

C(32) = $44.89