anonymous
  • anonymous
Determine whether the lines through the pairs of points are perpendicular. A: (2,0) B: (1, -2) and C: (4,2) D: (-8, 4) I'm ok with the graphs, but I don't know which formula to use. I know that I should use the slope formula to find the slope.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
slope=\[slope(m)=(y2-y1)/(x2-x1)\]
anonymous
  • anonymous
if m1*m2=-1 then perpendicular
anonymous
  • anonymous
I thought it was m1= -1/m2

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anonymous
  • anonymous
its the same
anonymous
  • anonymous
I got two different answers using both. For the one you told me about I got -1/3 = -1 and for the other formula I got 2 = 6
anonymous
  • anonymous
slope(AB)=2 and slope(CD)=-(1/6)
anonymous
  • anonymous
they are not perpendicular
anonymous
  • anonymous
Thank you. @Gyan_09
anonymous
  • anonymous
you are welcome!

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