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17 August, 14:55

There is a linear relationship between a car's weight and its gas mileage. On average, a car that weighs 2400 lb gets 35 mi/gal and a 3000 lb car gets 29 mi/gal. Let w = car weight and g = miles per gallon. What is an equation that models the relationship between the variables?

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  1. 17 August, 14:57
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    The required equation is

    w - 2400 = (3000 - 2400) / (29 - 35) (g - 35)

    w - 2400 = - 100 (g - 35)

    w - 2400 = - 100g + 3500

    w + 100g = 3500 + 2400 = 5900

    w + 100g = 5900
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