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1 November, 10:32

Find y when X=14 if y varies directly with X2, and y=72 when X=6.

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  1. 1 November, 11:01
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    When y varies directly with x, y=kx where k is a constant.

    Find k

    72=6k

    k=12

    Plug k back into the equation to find y

    y=12*14

    y=168
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