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# In the XY plane line k passes through the point (1,1) and

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In the XY plane line k passes through the point (1,1) and [#permalink]

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12 Jan 2009, 06:20
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In the XY plane line k passes through the point (1,1) and line m passes through the point (1,-1). Are lines k and m are perpendicular to each other?

A. Line k and m intersect at the point (1,-1)
B. Line k intersect X-axis at the point (1,0)

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Joined: 04 Jan 2009
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12 Jan 2009, 10:39
shobuj40 wrote:
In the XY plane line k passes through the point (1,1) and line m passes through the point (1,-1). Are lines k and m are perpendicular to each other?

A. Line k and m intersect at the point (1,-1)
B. Line k intersect X-axis at the point (1,0)

two points are reqd to define a line.
A=> defines line k fully but not m.
b=> reiterates A.

Hence, both together not sufficient.
_________________

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tusharvk

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Re: source GMATPrep   [#permalink] 12 Jan 2009, 10:39
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