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26 March, 19:07

If y varies directly with x and y=100 when x=5, what is the value of k?

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  1. 26 March, 22:51
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    When it says varies directly, it means that y and x are going to be on opposite sides of the equals sign and that there is a constant, k,

    y=kx

    Plug in (5,100)

    100=k (5)

    K=20
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