anonymous
  • anonymous
i know this problem was done but im still confused. Find the equation of a line passing through (-2,3) (-1/2,6)
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
i understand first you find slope... then what? please help!!
anonymous
  • anonymous
Do you the y = mx + b formula?
anonymous
  • anonymous
yes

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anonymous
  • anonymous
Yeah, so when you find the slope, you can put that in for m. Since you already know two points, you can pick one of them, for example -2,3 into the equation. So you get 3 = -2x (what you got for m) + b then you just solve for b
anonymous
  • anonymous
x is multiplication*
anonymous
  • anonymous
so y=2x+7 would be the final answer?
phi
  • phi
yes
anonymous
  • anonymous
thank you!
phi
  • phi
It looks like you understand it, but if you want more insight, try http://www.khanacademy.org/video/equation-of-a-line-1?topic=developmental-math-2 and a few of the other videos he does with finding the equation of a line

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