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OpenStudy (anonymous):
determine whether y varies directly with x. if so find the constant of variation k. 7y=-x a. yes; -1 b. yes; -1/7 c. yes; -7 d. no
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OpenStudy (anonymous):
The formula for direct variation is y = kx
OpenStudy (anonymous):
solve for y y = -x/7 so k is -1/7, B.
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