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ChinaGurl

Two lines are perpendicular. If one line has a slope of 1/21 , what is the slope of the other line? A. -1/21 B. 1/21 C. 21 D. -21

  • one year ago
  • one year ago

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  1. Compassionate
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    -21

    • one year ago
  2. Compassionate
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    -Snipped-

    • one year ago
  3. mathstudent55
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    Perpendicular lines have slopes that are negative reciprocals. That isa fancy mathematical way of saying that if you have the slope of one line and you want the slope of a perpendicular to that line, filp the fraction and change the sign.

    • one year ago
  4. mathstudent55
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    1/21 Filp it: 21/1 = 21 Change sign: -21

    • one year ago
  5. seanwalsh1984
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    Flip the sign and negate it. 1/21 becomes -1/21.Now flip. Becomes -21.

    • one year ago
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