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OpenStudy (anonymous):
Select the pair of slopes that are the slopes of perpendicular lines. 1/2 and 2 3/4 and -4/3 -2/5 and -5/2 2 and 2
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OpenStudy (noseboy908):
The slopes of perpendicular lines will be negative reciprocals of eachother, meaning that if one is, for instance, -1/2, the other will be 2/1, or just 2. Get it?
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