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Anonymous
if and x equal -18 find y
-18 * 1/3 = -6
Wiki User
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If y(x) = 1/3x, y(-18) = 1/[3(-18)] = -1/54.
y varies directly as x y=kx, where k is a constant y=18 when x=3 18=3k k=6 y=6x
57
(3,21)
x2 / y = (6)2 /2 = 36/2 = 18