Math - APPRICIATE ALL HELP!

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. If the monthly bill fro 24 HCF is $47.72, what is the monthly bill for 29 HCF?

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  1. y = mx +b

    47.72 = 1.75(24) + b
    47.72 - (1.75)(24) = b

    solve for b

    Then replace m in y = mx + b with 1.75 and the b with your solution from above.

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