SOLUTION: Linear equation for (1, -2) and (-1, -1)

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Question 785322: Linear equation for (1, -2) and (-1, -1)
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
x1 y1 x2 y2
1 -2 -1 -1

The general equation of the line when co-ordinates of two points are given is

%28y-%09y1%29%2F%28%09y1-y2%29+=+%28x-x1%29%2F%28x1-x2%29




%28y%092++++++%09%29%2F%28%09-1++++++%09x%09-1++++++%09%29+%2F%28%092++++++%09%29

+%092++++++%09%28y%2B%092++++++%09%29+=%09-1++++++%09%28x-%091++++++%09%29

2 y+ 4 = -1 x+ -1

2 y= -1 x -5
/ 2
y= - 1/ 2 x -5/ 2