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10. Determine whether y = 4x + 5 and y = 1/4x-2 are perpendicular.
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10. Determine whether y = 4x + 5 and y = 1/4x-2 are perpendicular.

User Konrad Reiche
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They are perpendicular 1/4 is the reciprocal to 4
User ChrisD
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They are perpendicular because 1/4 is the opposite reciprocal of 4.
4/1 flipped over is 1/4 which is the slope of both. That means that if the number is the opposite reciprocal, and it’s on the slope, then the 2 lines are perpendicular.
User Avinash Jadaun
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3.8k points
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