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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Originally Posted by robpez 2,6 and -2,8 Slope is, m1=(6-8)/(2-(-2))=-2/(4)=-1/2 0,3 and 1,5 Slope is, m2=(3-5)/(0-1)=(-2)/(-1)=2 Since, m1m2=-1 We now that the lines are perpendicular.

Last edited by ThePerfectHacker; September 27th 2006 at 05:05 AM.

Originally Posted by ThePerfectHacker Since, m1m2=1 We now that the lines are perpendicular. Slight typo here, this should be m1m2 = -1 means the lines are perpendicular. -Dan (POST CORRECTED)

Last edited by ThePerfectHacker; September 27th 2006 at 05:04 AM.

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