Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack
GMAT Club

 It is currently 29 Mar 2017, 14:16

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# In xy-plane, does line with equation y = 3x+2 contain the

 post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
Intern
Joined: 12 Apr 2009
Posts: 24
Followers: 0

Kudos [?]: 6 [0], given: 2

In xy-plane, does line with equation y = 3x+2 contain the [#permalink]

### Show Tags

12 May 2009, 17:34
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

In xy-plane, does line with equation y = 3x+2 contain the point (r,s)?

1. (3r +2-s)(4r+9-s)=0

2. (4r-6-s)(3r+2-s)=0
SVP
Joined: 07 Nov 2007
Posts: 1821
Location: New York
Followers: 36

Kudos [?]: 900 [1] , given: 5

Re: DS Question 2 [#permalink]

### Show Tags

12 May 2009, 19:58
1
KUDOS
meesawoosa wrote:
In xy-plane, does line with equation y = 3x+2 contain the point (r,s)?

1. (3r +2-s)(4r+9-s)=0

2. (4r-6-s)(3r+2-s)=0

rewrite the question stem:
Is s=3r+2 ? (i.e 3r-s+2=0?)

1) (3r +2-s)(4r+9-s)=0
either (3r +2-s) =0 or (4r+9-s)=0 or both=0

not sufficient

2) (4r-6-s)(3r+2-s)=0
either (3r +2-s) =0 or (4r-6-s)=0 or both=0

combined
assume that (4r+9-s)=0 then (4r-6-s) definitely <>0 so (3r +2-s) =0 must satisfy.

C is the answer.
_________________

Smiling wins more friends than frowning

Director
Joined: 23 May 2008
Posts: 833
Followers: 3

Kudos [?]: 73 [0], given: 0

Re: DS Question 2 [#permalink]

### Show Tags

12 May 2009, 21:47
x2suresh wrote:
meesawoosa wrote:
In xy-plane, does line with equation y = 3x+2 contain the point (r,s)?

1. (3r +2-s)(4r+9-s)=0

2. (4r-6-s)(3r+2-s)=0

rewrite the question stem:
Is s=3r+2 ? (i.e 3r-s+2=0?)

1) (3r +2-s)(4r+9-s)=0
either (3r +2-s) =0 or (4r+9-s)=0 or both=0

not sufficient

2) (4r-6-s)(3r+2-s)=0
either (3r +2-s) =0 or (4r-6-s)=0 or both=0

combined
assume that (4r+9-s)=0 then (4r-6-s) definitely <>0 so (3r +2-s) =0 must satisfy.
C is the answer.

i found both statements insufficient but couldnt see how the answer could be C

can you elaborate on C? I dont really understand your rationalization
Manager
Joined: 14 May 2009
Posts: 193
Schools: Stanford, Harvard, Berkeley, INSEAD
Followers: 5

Kudos [?]: 37 [0], given: 1

Re: DS Question 2 [#permalink]

### Show Tags

14 May 2009, 13:52
meesawoosa wrote:
In xy-plane, does line with equation y = 3x+2 contain the point (r,s)?

1. $$(3r +2-s)(4r+9-s)=0$$

2. $$(4r-6-s)(3r+2-s)=0$$

If (r,s) is on the line y=3x+2, then we can substitute in y=s & x=r into the equation to get,
Question:($$s=3r+2$$)?
Question:($$3r+2-s=0$$)?

(1) $$(3r +2-s)(4r+9-s)=0$$
This implies that either $$3r+2-s=0$$ or $$4r+9-s=0$$, the first equation gives us a YES, the second one a NO. Insufficient.

(2) $$(4r-6-s)(3r+2-s)=0$$
This implies that either $$4r-6-s=0$$ or $$3r+2-s=0$$, the first equation gives us a YES, the second one a NO. Insufficient.

(1&2) Combining the facts above gives us
$$3+2-s=0$$ OR $$4r+9-s=0$$
AND
$$4r-6-s=0$$ OR $$3r+2-s=0$$

This implies that $$3r+2-s=0$$ is true, what we're trying to find.

_________________

Re: DS Question 2   [#permalink] 14 May 2009, 13:52
Display posts from previous: Sort by

# In xy-plane, does line with equation y = 3x+2 contain the

 post reply Question banks Downloads My Bookmarks Reviews Important topics

 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®.