prove that (-5,7) and(0, -2) is perpendicular to line through(1,-3) and (4,-4\3)
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M1=-2-7/0-(-5)=-9/5
M2=-4/3-(-3)/4-1=5/9
M1×M2=-9/5×5/9=-1 SO IT IS PERPENDICULAR TO LINE..
M2=-4/3-(-3)/4-1=5/9
M1×M2=-9/5×5/9=-1 SO IT IS PERPENDICULAR TO LINE..
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