SOLUTION: If the points A(-1,1) and B(1,2) lie on a line m, what is the slope of line m?

Question 253320: If the points A(-1,1) and B(1,2) lie on a line m, what is the slope of line m?

Found 2 solutions by jim_thompson5910, palanisamy:
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Note: is the first point . So this means that and .
Also, is the second point . So this means that and .

Start with the slope formula.

Plug in , , , and

Subtract from to get

Subtract from to get

So the slope of the line that goes through the points and is

Answer by palanisamy(496) (Show Source): You can put this solution on YOUR website!
Given, A(-1,1) and B(1,2)
Slope of the line AM is
m = ( Difference of y- coordinates)/( Difference of x- coordinates)
m = (1-2)/(-1-1)
m = -1/(-2)
m = 1/2
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