math

Mr. Simon landscapes new houses for a building contractor. He charges by the square meter of yard space plus a setup fee. He billed the contractor $2,150 for a 400-square- meter yard and $1,650 for a 300-square-meter yard. Write an equation in the form
y = mx + b that can be used to find the cost, y, to landscape any amount of yard space, x.\

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  1. 400m+b = 2150
    300m+b = 1650
    subtract to get
    100m = 500
    m = 5
    so, b = 150

    y = 5x+150

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    posted by Steve

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