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How are the slopes of parallel lines and perpendicular lines related?

User Yolie
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1 Answer

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1. Slope are parallel lines are equal (the same)
y=2x+5, y=2x+7
2. Slope are perpendicular lines are negative reciprocal
Example, y=2x+5, y=-1/2 x + 7
User Jorgenfb
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