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math

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which of the following is an example of a proportional relationship between x and y?

A. y = 2
B. y = 3x
C. 4y + 4x = 6
D. 4y - 2 = 2x - 4

  • math -

    I couldn't even understand the question, can anyone help?

  • math -

    http://www.mathsisfun.com/algebra/cross-multiply.html

    The only choice that has y on one side and x on the other is D.

  • math -

    so when the quetion comes like this, x and y are impossible in one side together? but B also is y on one side and x on the other side, i am so confused.

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