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Question

Find the slope of the line perpendicular to AB where A( 5 , - 6) and B(2 , -7 )

A
-2
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B
-3
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C
1
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D
2
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Solution

The correct option is B -3
Slope of line joining two points (x1,y1) and (x2,y2) is y2y1x2x1
So, Slope of line joining A(5,6);B(2,7) is 7+625=13
Slope of a line perpendicular to another line of slop m is 1m
So, slope of line perpendicular to AB is 113=3

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