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If two lines are perpendicular, what is the product of their slopes?
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If two lines are perpendicular, what is the product of their slopes?

User JulienD
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The product of the slopes would be -1 because the slopes of two lines that are perpendicular are opposite reciprocals (ex. 2 and -1/2 multiplied together would be -1)
User Julien Arzul
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