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

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VP
Joined: 22 Nov 2007
Posts: 1079

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

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10 Mar 2008, 11:49
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

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 perpendicular to each other?

(1) Line k and m intersect at the point (1,-1).
(2) Line k intersects the x-axis at the point (1,0).

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Senior Manager
Joined: 15 Aug 2007
Posts: 252

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Schools: Chicago Booth
Re: gmatprep coordinate geo [#permalink]

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10 Mar 2008, 16:33
E

1: No additional information about line m is available (slope, another point etc) - insufficient

2: Actually this information is already provided in statement 1. Only that (1,0) in the mid point of (1,1) and (1,-1)

Combined - no information about line m.

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Manager
Joined: 11 Apr 2007
Posts: 143

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Re: gmatprep coordinate geo [#permalink]

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10 Mar 2008, 16:36
I don't really understant what statement 1 says. I understand that line k and m intersect in one point> i know that 2 lines are parallel if they do not intersect.

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Manager
Joined: 11 Apr 2007
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Re: gmatprep coordinate geo [#permalink]

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10 Mar 2008, 16:38
Ignore my previous post. I'm too tired.

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Director
Joined: 01 May 2007
Posts: 794

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Re: gmatprep coordinate geo [#permalink]

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12 Apr 2008, 11:35
Can someone sketch this out...I don't understand why A is not suff..

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Re: gmatprep coordinate geo   [#permalink] 12 Apr 2008, 11:35
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# In the xy-plane, line k passes through the point (1,1) and

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