anonymous
  • anonymous
slope=mx+b right?
Mathematics
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
wrong
anonymous
  • anonymous
m= slope
anonymous
  • anonymous
if the equation is in the form y=mx+c then m is the slope

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anonymous
  • anonymous
how would I find the slope of (7, -4) and (3, 6)?
anonymous
  • anonymous
IMPORTANT LINE RELATED EQUATIONS TO KNOW AND MEMORIZE slope formula m= slope/ gradiant -- same thing \[m=\frac{y_2-y_1}{x_2-x_1}\] standard formula \[Ax+By=C\] point-slope formula \[y-y_1=m(x-x_1)\] slope-intercept formula b= y-intercept -- in the form of (0,y) \[y=mx+b\]
anonymous
  • anonymous
so would my slope be 5/2?
anonymous
  • anonymous
6 - (-4) = 10 3 - 7 = -4 10/-4 = -5/2 close, but you added instead of subtracting 7 ;)
phi
  • phi
(7, -4) and (3, 6)? -4 - 6 = -10 (change in y) 7 -3 = 4 change in x change in y divided by change in x is -10/4 or -5/2
phi
  • phi
finding the slope means you subtract two pairs of numbers then divide 3 steps to the problem. Now all you have to do is remember this
anonymous
  • anonymous
ty all!!!!!!!!!!!!!!!!!!!!!
phi
  • phi
Here is a video that makes it clear http://www.khanacademy.org/math/algebra/linear-equations-and-inequalitie/slope-and-intercepts/v/slope-of-a-line
anonymous
  • anonymous
@phi if my slope is -5/2 would my line fall left to right?
phi
  • phi
if the slope is -5/2 then the y changes by -5 (goes down) when x changes by 2 (goes to the right) |dw:1371404438471:dw|
anonymous
  • anonymous
yes that's what I said, what about -2/0 can that be a slope?@phi
anonymous
  • anonymous
well, you can't divide by zero, so no it cannot be that would be the slope of any vertical line (undefined) you could have 0/-2, though, which would be the slope of a horizontal line (0)
phi
  • phi
the slope idea "breaks" when you divide by 0. The slope of -2/0 is undefined, but it means the line is going straight up and down. and btw, a slope of 0 means the line is going straight left to right

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