Math Please help Ms. Sue

How can you determine if the given lines are perpendicular?

Line 1: (-1,3) and (3,-3)

Line 2: (-3,0) and (3,3)

A)determine if they have slopes with opposite values***
B)determine if they have the same slope
C)determine if the product of their slope is 1
D)determine if the product of their slope is -1

Please check my answer?

  1. 0
  2. 13
asked by Sarah
  1. I'm not Ms. Sue (sorry), but your answer is correct. :)

    posted by Tia
  2. Thank you for your help! (=

    posted by Sarah
  3. The answer is D

    posted by PAT
  4. the right answer is D

    posted by snow
  5. Thanks PAT and snow, the correct answer is D.

    posted by Iris

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