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19 December, 22:16

If y varies directly as x and y = 30 and x = - 10, find y when x = 56

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  1. 20 December, 01:48
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    y = -168

    Step-by-step explanation:

    The direct variation is given by

    y = kx

    Y=30 and x = - 10 we can find k

    30 = k (-10)

    30/-10 = k (-10) / -10

    -3 = k

    y = - 3x

    We know x and we want to find y

    y = - 3 (56)

    y = -168
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