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16 December, 22:35

Suppose y varies directly with x. If y = - 4 when x = 8, what is the equation of direct variation? Complete the steps to write the equation of direct variation. Start with the equation of direct variation y = kx. Substitute in the given values for x and y to get. Solve for k to get. Write the direct variation equation with the value found for k. The equation is

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  1. 16 December, 23:55
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    Y=kx

    in this case, y=-4, x=8, k is the constant which we need to find

    -4=8k =. k=-1/2

    so the equation is y = (-1/2) x
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