Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
04 May 2008, 14:52
Kudos
Bookmarks
Could you please provide an explanation for this question, I think I am missing an obvious point here.
Thank you.
Thank you.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
04 May 2008, 15:12
Kudos
Bookmarks
ventivish
C for me.
L = m1*x + b1
K = m2 *x + b2
We want to find if m1*m2<0 ?
(1) is given that product of x intercepts is positive
To find x-intercept, set y=0.
For line L: x = -b1/m1
For line K: x = -b2/m2
So we know that
(b1/m1)*(b2/m2) >0
In this case, we don't know b1 or b2, so INSUFFICIENT
(2) is given that product of y intercepts is negative
To find y-intercept, set x=0
For line L: y = b1
For line K: y = b2
So we know that
b1*b2 < 0
Don't know anything about slopes, INSUFFICIENT
Together, we know that
(b1*b2) / (m1*m2) > 0 AND b1*b2 < 0
This means that
m1 * m2 must be negative.
SUFFICIENT
04 May 2008, 17:07
Kudos
Bookmarks
Thank you !!!Makes sense now.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
