I need some help with this problem could you show me how to answer it and could you also graph it please.

determain weather the lines through each pair of points are parallel or perpendicular

2,6 and -2,8

0,3 and 1,5

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- September 26th 2006, 07:39 PM #1

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- September 26th 2006, 07:45 PM #2

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- September 27th 2006, 02:51 AM #3