anonymous
  • anonymous
Hi, I totally forgot how to do line and slope, can someone help me out???
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
how do you want to be helped? do you have example problems?
anonymous
  • anonymous
Well, the first point on the graph is 1,2, the second is 0,-2
anonymous
  • anonymous
okay do you know how to find the slope of the line given two points?

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anonymous
  • anonymous
no, that's why I'm here
anonymous
  • anonymous
mmk, i'm just asking
anonymous
  • anonymous
formula for slope is change in y over change in x
anonymous
  • anonymous
so slope would be (-2 -2) / (0 - 1) which comes out to be 4 so the slope is four
anonymous
  • anonymous
oh, I get it now, I was looking online, but everything was too comlicated, thanks for the help
anonymous
  • anonymous
now we have the formula for a line y = mx + b where m is the slope and b is the intercept put slope in y = 4x + b we are also given two points, since both points are on the line, you can pick either say we pick the first one, plug it in for x and y 2 = 4(1) + b b = -2 line is y = 4x - 2
anonymous
  • anonymous
sure thing
anonymous
  • anonymous
that works, okay, that totally helps with homework, I'm glad i found this site
anonymous
  • anonymous
cheers
anonymous
  • anonymous
thanks for the help
anonymous
  • anonymous
no problem
anonymous
  • anonymous
alright, i have another question
anonymous
  • anonymous
hello????????
anonymous
  • anonymous
go ahead
anonymous
  • anonymous
so if the equation is (3,-2), (0,-3) then u would switch it around to (0,-2), (3,-3)????
anonymous
  • anonymous
??????
anonymous
  • anonymous
just because we are live, doesn't mean we are going to respond instantly you can't switch them because you would be changing the points
anonymous
  • anonymous
then wat? I don't get it then.
anonymous
  • anonymous
then you find the slope, like we did in the first question change in y over change in x
anonymous
  • anonymous
i still don't understand, i'm only in 7th grade
anonymous
  • anonymous
the question is find a line between (3,-2), (0,-3) so find the slope change in y over change in x (-3 - -2)/ (0 - 3) slope is 1/3 understand this?
anonymous
  • anonymous
wait, so its kinda like subtracting
anonymous
  • anonymous
yes slope formula is \[\frac{x1 - x2}{y1 - y2}\] is this more clear?
anonymous
  • anonymous
i totaly get it now, OH, we did this last year in school, thanks!!!! (:
anonymous
  • anonymous
lol no problem good luck
anonymous
  • anonymous
thanks

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