It is currently 20 Oct 2017, 09:10

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

intersecting lines

Author Message
Senior Manager
Joined: 02 Dec 2007
Posts: 450

Kudos [?]: 290 [0], given: 6

Show Tags

15 Jun 2008, 00:21
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Can anyone explain how to approach such questions?
Attachments

intersectinglines.JPG [ 60.54 KiB | Viewed 1194 times ]

Kudos [?]: 290 [0], given: 6

Director
Joined: 23 Sep 2007
Posts: 782

Kudos [?]: 236 [0], given: 0

Show Tags

15 Jun 2008, 09:25
drawing lines is the fastest approach, it is difficult to explain this using numbers.

Kudos [?]: 236 [0], given: 0

Senior Manager
Joined: 26 Mar 2008
Posts: 317

Kudos [?]: 91 [0], given: 4

Location: Washington DC

Show Tags

15 Jun 2008, 09:37
Using this information we can conclude-
Line 1 is on +ve XY plan, Hence +ve slope
and Line 2 is on -ve XY plan, Hence -ve slope

So products of their slope would -ve.

Kudos [?]: 91 [0], given: 4

Manager
Joined: 22 May 2007
Posts: 219

Kudos [?]: 126 [0], given: 0

Show Tags

15 Jun 2008, 10:48
Nihit,

The intercept form of the line

x/a+y/b = 1

where a=x-intercept
b= y-intercept

if you solve the above equation for y. In other words, put it in the form of y=mx+c where m is the slope
you will end up with m=b/a or y-intercept/x-intercept

Now going back to the DS, you will see that you will need both statements to solve the product of the slopes because the individual statements give you information on individual intercepts.

Does this help?

Kudos [?]: 126 [0], given: 0

Senior Manager
Joined: 02 Dec 2007
Posts: 450

Kudos [?]: 290 [0], given: 6

Show Tags

17 Jun 2008, 09:59
thanks guys !

P.S. Aaron yes it did help,many thanks

Kudos [?]: 290 [0], given: 6

Re: intersecting lines   [#permalink] 17 Jun 2008, 09:59
Display posts from previous: Sort by