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8 March, 06:42

Y varies directly with the square x. If y = 27 when x = 3, find y when x = - 4

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  1. 8 March, 08:47
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    y~x²

    y/x² = k

    27/3²=3

    therefore k = 3

    y / - 4 = k

    y / - 4 = 3

    3y = - 4

    y = - 4
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