anonymous
  • anonymous
@ivettef365 how would I find the slope intercept form, and point slope form of: Passes through (-1, -1) and is perpendicular to y = x - 8.
Mathematics
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schrodinger
  • schrodinger
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ivettef365
  • ivettef365
ok to be perpendicular the slope needs to be opposite reciprocal so you have y = x - 8 , slope = 1, so opposite reciprocal would be -1 right??
anonymous
  • anonymous
right
anonymous
  • anonymous
so the slope has to equal -1

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ivettef365
  • ivettef365
now use the formula to find b, so you have y = mx + b where y=-1. x=-1 and m = -1, so what is b
anonymous
  • anonymous
-2 @ivettef365
anonymous
  • anonymous
so my slope intercept formula would be y=-1*-1+-2?
anonymous
  • anonymous
no y=-1x-2?
ivettef365
  • ivettef365
right that is correct, and you can write it as follows: y = -x -2
anonymous
  • anonymous
ok and what about the point slope form, y+1=-1(x+1)
ivettef365
  • ivettef365
correct
anonymous
  • anonymous
ty!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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