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12 February, 08:29

Suppose y varies directly with x. Write an equation relating x and y. y = 7.5 when x = 10

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  1. 12 February, 08:46
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    Y = kx is the direct variation equation.

    First you have to find k.

    7.5 = k (10)

    divide both sides by 10

    7.5/10 = k

    .75 = k

    y =.75x is the equation relating x and y with these criteria.
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