Find all School-related info fast with the new School-Specific MBA Forum

It is currently 02 Aug 2015, 05:02
GMAT Club Tests

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

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

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 18 Aug 2009
Posts: 437
Schools: UT at Austin, Indiana State University, UC at Berkeley
WE 1: 5.5
WE 2: 5.5
WE 3: 6.0
Followers: 6

Kudos [?]: 75 [0], given: 16

In the xy-plane, line k passes through the point (1, 1) and line m [#permalink] New post 27 Jan 2010, 09:48
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

67% (01:44) correct 33% (00:28) wrong based on 2 sessions
Please, explain...In the xy-plane, line k passes through the point (1, 1) and line m passes through the point (1, -1). Are the lines k and m perpendicular to each other ?

(1) Lines k and m intersect at the point (1, -1)
(2) Line k intersects the x-axis at the point (1, 0)
[Reveal] Spoiler: OA

_________________

Never give up,,,


Last edited by Bunuel on 28 Jul 2015, 06:03, edited 1 time in total.
Renamed the topic, edited the question and added the OA.
Intern
Intern
avatar
Joined: 16 May 2009
Posts: 28
Followers: 0

Kudos [?]: 28 [0], given: 3

Re: In the xy-plane, line k passes through the point (1, 1) and line m [#permalink] New post 27 Jan 2010, 14:03
imagine line K extending from (1,1) intersecting the x axis at 1 ,and reachig point (1,-1) and quadrant IV.
now line M meets k at (1 , -1) but we dont know to which direction its sloping , could be horizontal at y = -1 or it could be -vely sloped . That doesnt tell us whether the 2 lines are perpindiclar
Manager
Manager
avatar
Joined: 24 Jun 2009
Posts: 60
Followers: 1

Kudos [?]: 29 [0], given: 2

Re: In the xy-plane, line k passes through the point (1, 1) and line m [#permalink] New post 27 Jan 2010, 16:50
To determine if the lines are perpendicular we need to know the slopes of the two lines. Two points are given for line k but only one point is given for line l so it is impossible to find the slope of line l. The two points help us find rise/run which is the slope.


The lines would be perpendicular if the slops of the two lines are negative reciprocals of each other.

Answer: E
Senior Manager
Senior Manager
User avatar
Joined: 21 Jul 2009
Posts: 366
Schools: LBS, INSEAD, IMD, ISB - Anything with just 1 yr program.
Followers: 15

Kudos [?]: 117 [0], given: 22

Re: In the xy-plane, line k passes through the point (1, 1) and line m [#permalink] New post 27 Jan 2010, 20:06
mirzohidjon wrote:
Please, explain...


I'll tell you what your mistake was.

You calculated line K's slope as -infinity and for line m, though it's the same point, you might not have recognized it in your hurry and solved for slope consider the same point as twice, giving you a +infinity as slope. So obviously, they seem perpendicular but actually, product of slopes of perpendicular intersecting lines is supposed to be -1, and we are not sure if product of two infinities is 1.
_________________

I am AWESOME and it's gonna be LEGENDARY!!!

Manager
Manager
User avatar
Joined: 22 Jan 2010
Posts: 121
Schools: UCLA, INSEAD
Followers: 2

Kudos [?]: 4 [0], given: 15

Re: In the xy-plane, line k passes through the point (1, 1) and line m [#permalink] New post 27 Jan 2010, 21:20
Thanks for posting.
Manager
Manager
avatar
Joined: 26 Nov 2009
Posts: 176
Followers: 3

Kudos [?]: 53 [0], given: 5

GMAT ToolKit User
Re: In the xy-plane, line k passes through the point (1, 1) and line m [#permalink] New post 15 Feb 2010, 04:36
ans is e

to lines will be perpendicular when the product of the slopes of that 2 lines yield -1.

both the stmts don't satisfy the above criteria
Re: In the xy-plane, line k passes through the point (1, 1) and line m   [#permalink] 15 Feb 2010, 04:36
    Similar topics Author Replies Last post
Similar
Topics:
7 Experts publish their posts in the topic In the xy-plane, line m is a line that does not pass through the origi Bunuel 8 14 May 2015, 03:47
3 Experts publish their posts in the topic In the xy-plane, line l passes through the point (-7, k). What is the Bunuel 3 19 Jan 2015, 05:02
8 Experts publish their posts in the topic In the xy-plane, line k passes through the point (1, 1) and line m gautamsubrahmanyam 15 11 Jun 2010, 06:24
13 Experts publish their posts in the topic Line m and n pass through point (1,2). Is the slope of m apoorvasrivastva 15 20 Feb 2010, 22:38
14 Experts publish their posts in the topic In the xy-plane, the line k passes through the origin and th lan583 8 24 Aug 2006, 15:40
Display posts from previous: Sort by

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

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.