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OpenStudy (anonymous):
True or False? Y varies directly with x and y = -9 when x = 3. When y = 27, the value of x is 9.
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OpenStudy (anonymous):
y is directly proportional to x then y=kx, so when x=3 nd y=-9 it gives the value of k=-3...hence when x=9 then shud be -27...hence it is false
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