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27 February, 16:19

If y varies directly as x, and y = 36 as x = 9, find y for the x-value 5

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  1. 27 February, 16:37
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    Y varies directly as x means this equation : y=kx

    given y=36 and x=9, plug it into the equation to find k

    36 = 9k, so k=?

    k=4

    so now you have your equation y=4x

    and you're trying to find y given x=5

    so

    y = 4 (5) so y=?
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