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7 March, 08:17

suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12. y=3 when x=2

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  1. 7 March, 12:03
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    y ∝ x

    ⇒ y = kx

    When x = 12 and y = 3, substitute into the formula above

    3 = k x 12

    k = 1/4

    substitute k = 1/4 into the formula

    y = x/4 which is the equation that relates x and y

    Ti find y when x = 2

    ⇒ y = 2/4

    y = 1/2
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