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(1,2) : (-2,1) :: (3,-4) : ______

a. (-4,-3) b. (-3,4) c. (4,3) d. (-4,3)
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(4,3)

When comparing (1,2) and (-2,1), the x and y coordinates are being interchanged, and the x is given the opposite sign. The same procedure is followed for comparing (-3,4) to (4,3); the coordinates are interchanged, and the x is given the opposite sign.

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