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12-12-2016
Mathematics

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y varies directly with x, and y = 9 when x = 2. What is the value of y when x = 3?

Respuesta :

12-12-2016

direct variation equation is y = kx where k is the constant of variation.
First use the x and y you are given to find the k.
9 = k * 2
9/2 = k
Then use the k and new x to find the y.
y = (9/2)(3)
y = 27/2

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