Determine whether points a(-1,-1),b(0,1),&(1,3)are collinear or not in practice set 5.3 in standard 10th
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slope of line ab=1-(-1)/0-(-1)
=1+1/1
=2...I
slope of line bc=3-1/1-0
=2/1
=2....II
FROM I &II WE GET
SLOPE OF LINE AB=SLOPR OF LNE BC
AND BOTH THE LINES HAVE A COMMON POINT B
HENCE POINTS A,B AND C ARE COLLINEAR
hope this helps
=1+1/1
=2...I
slope of line bc=3-1/1-0
=2/1
=2....II
FROM I &II WE GET
SLOPE OF LINE AB=SLOPR OF LNE BC
AND BOTH THE LINES HAVE A COMMON POINT B
HENCE POINTS A,B AND C ARE COLLINEAR
hope this helps
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