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11 January, 17:35

If y varies directly as x, and y=14 when x=3.5 find y when x=2

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  1. 11 January, 19:26
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    y = 8

    y varies directly as x

    y ∞ x

    y=14 when x=3.5

    y = kx

    k is a constant, when multiplied by x, you get y

    14 = 3.5k

    Solve to find k:

    14/3.5 = k

    14/3.5 = 4

    k = 4

    y = 4x

    Find y when x=2

    y = 4x

    y = 4 (2)

    y = 8
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