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What is the direct variation equation if y varies directly with x and y = –18 when x = 3?

a. y=-1/6x



b. y = –3x


c. y = –6x


d. y = –15x

1 Answer

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c. y = -6x

if you substitute x by 3 it would be y= -6*3 = -18 (that's what you are given)
User Daniel Langer
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