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25 February, 17:33

Y varies directly with x, and y = 9 when x = 2. What is the value of y when x = 3? Enter your answer in the box.

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  1. 25 February, 19:10
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    Let y=kx

    9=2k

    k=4.5

    when x=3

    y=kx becomes

    y=4.5 x 3

    =13.5
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