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Linear Algebra
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OpenStudy (anonymous):
Given that y varies directly with x, write the linear function relating the two variables if y =8 when x=4
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OpenStudy (rajee_sam):
Y varies Directly with X So the equation is Y = kX Now we have to find what k is which the "constant of proportionality". For that you have been given y = 8 when x = 4 So write 8 = k.4; this gives k = 2 rewrite the equation now, Y = 2X; that's your answer
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