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4 December, 03:12

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

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Answers (2)
  1. 4 December, 03:25
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    They are perpendicular 1/4 is the reciprocal to 4
  2. 4 December, 03:41
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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.
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