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12 December, 04:45

Find y when x=5, if y varies directly as x and y = 5 when x=3.5

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  1. 12 December, 05:04
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    Answer: 3.5

    Step-by-step explanation:

    In variation, and from the above question,

    y ∞ x,

    y = kx, where k is the constant of proportionality

    first find the constant k

    5 = 5k

    Therefore

    k = 1

    Now to find y, substitute for k and x in the first equation above

    y = kx

    y = 1 x 3.5

    y = 3.5
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