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'By using the concept of slope, show that the points (-2,-1), (4,0), (3,3) and (-3,2) are the
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"By using the concept of slope, show that the points (-2,-1), (4,0),
(3,3) and (-3,2) are the vertices of a parallelogram."
(3,3) and (-3,2) are the vertices of a parallelogram."
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