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posted by Joslyn on Friday, January 13, 2012 at 3:54pm.
Find the slope if it exists of the lie containing the pair of points (-7,-11) and (-9,-17)
slope is change in y divided by change in x: (-17 - (-11))/(-9 - (-7)) = (-17+11)/(-9+7) = -6/-2 = 3
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