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

 It is currently 05 May 2015, 17:13

### 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

# ds: cordinate geometry

Author Message
TAGS:
Senior Manager
Joined: 02 Feb 2004
Posts: 345
Followers: 1

Kudos [?]: 23 [0], given: 0

ds: cordinate geometry [#permalink]  16 Apr 2005, 15:02
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
pls explain
Attachments

0013.jpg [ 6.8 KiB | Viewed 339 times ]

Director
Joined: 18 Feb 2005
Posts: 674
Followers: 1

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

Re: ds: cordinate geometry [#permalink]  16 Apr 2005, 16:00
mirhaque wrote:
pls explain

The slope of any line ax+by+c = 0 is -b/a .

From A we know that a*b <0 ie., either a is <0 or b<0.

Since slope is -b/a the slope is +ve......
Director
Joined: 04 Jul 2004
Posts: 905
Followers: 4

Kudos [?]: 25 [0], given: 0

(B)

Background Calculation: Line intersect X axis in -ve.
=> y = 0 => x= (-C/A)
=> for x to be negetive, (C/A) should be +ve.

So Modified Qus: whether C/A is +ve. (note question is: Are you able to answer this question.)
Now,
i) A*B -ve => either A -ve and B +ve or A +ve or B -ve
A can be +ve or ve and no information about C. So Insufficient.

ii) A*C > 0 => either A and C +ve or A and C -ve. In both cases C/A is +ve. => x -ve. => Sufficient
Similar topics Replies Last post
Similar
Topics:
cordinate geometry ds paper test 5 17 Sep 2008, 00:31
Paper test question cordinate geometry involving inequality 4 10 Sep 2008, 07:55
DS Geometry 5 06 Mar 2006, 17:03
DS- Geometry 2 19 Oct 2005, 19:09
DS - Geometry 5 05 Jul 2005, 08:17
Display posts from previous: Sort by