BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

co-ordinate geometry.

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 3835
Joined: Fri Apr 02, 2010 10:00 pm
Location: Milpitas, CA
Thanked: 1854 times
Followed by:523 members
GMAT Score:770

by Anurag@Gurome » Fri Apr 20, 2012 8:21 pm
Md.Nazrul Islam wrote:In the xy-plane , the line K pass through the origin and through the point (a,b)where ab (not equal 0)Is b positive .

1)The slope of line k is negative .

2)a<b .

(1) The slope of line K is negative implies b can be positive or negative.
No definite answer; NOT sufficient.

(2) a < b
If (a, b) = (2, 4), then b = positive
If (a, b) = (-4, -2), then b = negative.
No definite answer; NOT sufficient.

Combining (1) and (2), we know that either a = negative, b = positive OR a = positive, b = negative
Now a < b implies a = negative, b = positive, which implies certainly that b = positive; SUFFICIENT.

The correct answer is C.
Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)

Join Our Facebook Groups
GMAT with Gurome
https://www.facebook.com/groups/272466352793633/
Admissions with Gurome
https://www.facebook.com/groups/461459690536574/
Career Advising with Gurome
https://www.facebook.com/groups/360435787349781/
Top
Post new topic Post Reply
• Page 1 of 1