anonymous
  • anonymous
What is the slope of the line between (3, –4) and (–2, 1)?
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
What is the change in y coordinates??
anonymous
  • anonymous
3
anonymous
  • anonymous
How??

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anonymous
  • anonymous
1--4= -3
anonymous
  • anonymous
See, -(-) = + So, 1 - (-4) becomes 1 + 4 getting??
anonymous
  • anonymous
5 but how
anonymous
  • anonymous
-(-) becomes positive... Do you get that??
anonymous
  • anonymous
ok so how to find the ans
anonymous
  • anonymous
so you found y change = 5.. Now similarly tell me the change in x coordinates..
anonymous
  • anonymous
-5
anonymous
  • anonymous
Yes.. Now, \[Slope = \frac{y \; change}{x \; change}\] Can you do it now??
anonymous
  • anonymous
0
anonymous
  • anonymous
How??
anonymous
  • anonymous
\(Slope = \frac{5}{-5}\) Is it 0???
anonymous
  • anonymous
no u r wrong
anonymous
  • anonymous
How??
anonymous
  • anonymous
Aren't you getting the answer (-1) ???
anonymous
  • anonymous
is in between -2 and 2
anonymous
  • anonymous
See, the other formula of slope is: \[Slope = \frac{y_2 - y_1}{x_2 - x_1}\]
anonymous
  • anonymous
\[Slope = \frac{1 - (-4)}{-2-3} = \frac{5}{-5} = -1\]
anonymous
  • anonymous
Is -1 not between 2 and -2??
anonymous
  • anonymous
\(-2, -1, 0 , 1, 2\) It is between 2 and -2..

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