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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: 1105
Followers: 7

Kudos [?]: 185 [0], given: 0

In the xy-plane, line k passes through the point (1,1) and [#permalink]  10 Mar 2008, 10:49
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).
Senior Manager
Joined: 15 Aug 2007
Posts: 252
Schools: Chicago Booth
Followers: 1

Kudos [?]: 55 [0], given: 0

Re: gmatprep coordinate geo [#permalink]  10 Mar 2008, 15:33
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.
Manager
Joined: 11 Apr 2007
Posts: 143
Followers: 1

Kudos [?]: 20 [0], given: 0

Re: gmatprep coordinate geo [#permalink]  10 Mar 2008, 15:36
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.
Manager
Joined: 11 Apr 2007
Posts: 143
Followers: 1

Kudos [?]: 20 [0], given: 0

Re: gmatprep coordinate geo [#permalink]  10 Mar 2008, 15:38
Ignore my previous post. I'm too tired.
Director
Joined: 01 May 2007
Posts: 794
Followers: 1

Kudos [?]: 115 [0], given: 0

Re: gmatprep coordinate geo [#permalink]  12 Apr 2008, 10:35
Can someone sketch this out...I don't understand why A is not suff..
Re: gmatprep coordinate geo   [#permalink] 12 Apr 2008, 10:35
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