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Perpendicular graphs

  1. Jan 21, 2014 #1
    1. The problem statement, all variables and given/known data

    If the graphs of A1x + B1y = C1 and A2x + B2y = C2 are perpendicular, express the following in terms of A2 and B2.

    A1/B1= ?

    2. Relevant equations

    Negative reciprocal

    3. The attempt at a solution

    I thought that by expressing A2 and B2 with A1/B1, it would just be the negative reciprocal if its perpendicular so it would be -B2/A2 which is incorrect.
  2. jcsd
  3. Jan 21, 2014 #2


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    It shouldn't be marked as incorrect. It looks correct to me.
  4. Jan 21, 2014 #3
    This is how webassign screws you over!
  5. Jan 21, 2014 #4
    Thanks for the response! I knew it was correct
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