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

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

slope of line

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Legendary Member
Posts: 1309
Joined: Wed Mar 17, 2010 11:41 pmFollowed by: 5 members
Thanked: 33 times
by pradeepkaushal9518 » Sat May 08, 2010 3:46 am
In the xy-plane, what is the slope of line l?
(1) Line l dose not intersect the line with equation y = 1 - x.
(2) Line l intersects the line with equation y = x - 1.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Data Sufficiency |
User avatar
Master | Next Rank: 500 Posts
Posts: 170
Joined: Wed Jun 10, 2009 5:59 am
Thanked: 13 times

by iamseer » Sat May 08, 2010 5:05 am
IMO A

From 1:
Line l does intersect a line with slope -1. So line l has to have a slope of -1
Sufficient.

From 2:
Line l intersects a line with slope 1. In that case line l could have any slope other than 1.
Not Sufficient.
"Choose to chance the rapids and dance the tides"
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Legendary Member
Posts: 2326
Joined: Mon Jul 28, 2008 3:54 amFollowed by: 2 members
Thanked: 173 times
GMAT Score:710

by gmatmachoman » Sat May 08, 2010 5:16 am
iamseer wrote:IMO A

From 1:
Line l does intersect a line with slope -1. So line l has to have a slope of -1
Sufficient.

From 2:
Line l intersects a line with slope 1. In that case line l could have any slope other than 1.
Not Sufficient.
seer !

how do u say that Line L has to be parallel to that line??? Any lead on that?

I do agree if they are parallel m1 =m2. thats fine. But I am not sure from St1 we get whether they are parallel to each other.

Plz corretc me if i am wrong.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 170
Joined: Wed Jun 10, 2009 5:59 am
Thanked: 13 times

by iamseer » Sat May 08, 2010 5:23 am
gmatmachoman wrote: seer !

how do u say that Line L has to be parallel to that line??? Any lead on that?

I do agree if they are parallel m1 =m2. thats fine. But I am not sure from St1 we get whether they are parallel to each other.

Plz corretc me if i am wrong.
XY plane extends infinitely. A line extends infinitely in either direction too.

In case of 2 lines, they are either parallel or non-parallel i.e. they intersect each other. This holds true if the lines are in same plane. That is mentioned in the question.


Just for fun and better understanding draw a line on a piece of paper. Now, try drawing another line which does not intersect this line.

HTH!!
"Choose to chance the rapids and dance the tides"
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1