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Mathematics 9 Online
OpenStudy (iwantanswers):

Which of the following is an example of direct variation? y = 2x, 4 = xz, xy = z, or xz = y

OpenStudy (anonymous):

y=2x

OpenStudy (iwantanswers):

how do you know?

OpenStudy (anonymous):

Can you see that y/x=2

OpenStudy (anonymous):

Which means that y increases as x increases

OpenStudy (anonymous):

Direct variation is an equation in the form y = kx, or y/x = k. Now, we just compare this to the answer choices, and get (A), y = 2x.

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