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are lines K & M perpendicular

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Source: — Data Sufficiency |
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by shankar.ashwin » Sat Oct 29, 2011 1:03 pm
E IMO.

You already know B from the question, it provides no additional info.

From A, m could be of any orientation intersecting at (1,-1)

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by vaibhavgupta » Sat Oct 29, 2011 2:37 pm
Megs17 wrote:In xy plane, line k passes through (1,1) and m through (1, -1). Are lines k and m perpendicular


a. k and m intersect at (1, -1)
b. k intersects x -axis at (1, 0)
IMO C
We can calculate their slopes using the points given. If its perpendicular= -1.


Whts OA?
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