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

It is currently 27 Aug 2014, 13:29

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

A line that passes through (–1, –4) and (3, k) has a slope =

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Expert Post
Magoosh GMAT Instructor
User avatar
Joined: 28 Dec 2011
Posts: 2041
Followers: 491

Kudos [?]: 2016 [0], given: 30

A line that passes through (–1, –4) and (3, k) has a slope = [#permalink] New post 19 Nov 2012, 16:30
Expert's post
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

77% (01:32) correct 23% (01:15) wrong based on 53 sessions
A line that passes through (–1, –4) and (3, k) has a slope = k. What is the value of k?
(A) 3/4
(B) 1
(C) 4/3
(D) 2
(E) 7/2


See a full discussion of lines & slope in the x-y plane here:
http://magoosh.com/gmat/2012/gmat-math- ... x-y-plane/

Experts: feel free to add any other x-y plane advice you would like to share.
[Reveal] Spoiler: OA

_________________

Mike McGarry
Magoosh Test Prep

Image

Image

Kaplan GMAT Prep Discount CodesKnewton GMAT Discount CodesManhattan GMAT Discount Codes
1 KUDOS received
Senior Manager
Senior Manager
User avatar
Status: Prevent and prepare. Not repent and repair!!
Joined: 13 Feb 2010
Posts: 278
Location: India
Concentration: Technology, General Management
GPA: 3.75
WE: Sales (Telecommunications)
Followers: 9

Kudos [?]: 20 [1] , given: 282

Re: A line that passes through (–1, –4) and (3, k) has a slope = [#permalink] New post 29 Nov 2012, 10:32
1
This post received
KUDOS
y=mx+c is the equation. Since the line passes through (-1,-4) and (3,k) substitute this for the value of x and y.

we get 2 equations

-4=-k+c...(1)
c=-2k.......(2)

Substitute for C in equation 1. we get k=4/3.

The ans is C.
_________________

I've failed over and over and over again in my life and that is why I succeed--Michael Jordan
Kudos drives a person to better himself every single time. So Pls give it generously
Wont give up till i hit a 700+

Director
Director
User avatar
Status: Done with formalities.. and back..
Joined: 15 Sep 2012
Posts: 646
Location: India
Concentration: Strategy, General Management
Schools: Olin - Wash U - Class of 2015
WE: Information Technology (Computer Software)
Followers: 35

Kudos [?]: 357 [0], given: 23

GMAT ToolKit User Premium Member
Re: line with variable slope [#permalink] New post 19 Nov 2012, 17:35
mikemcgarry wrote:
A line that passes through (–1, –4) and (3, k) has a slope = k. What is the value of k?
(A) 3/4
(B) 1
(C) 4/3
(D) 2
(E) 7/2


See a full discussion of lines & slope in the x-y plane here:
http://magoosh.com/gmat/2012/gmat-math- ... x-y-plane/

Experts: feel free to add any other x-y plane advice you would like to share.

Slope = (y2-y1)/(x2-x1)
=> k = (k+4)/(3+1)
=> 4k = k+4
=> k =4/3

Ans C it is!
_________________

Lets Kudos!!! ;-)
Black Friday Debrief

Senior Manager
Senior Manager
User avatar
Joined: 13 Aug 2012
Posts: 464
Concentration: Marketing, Finance
GMAT 1: Q V0
GPA: 3.23
Followers: 14

Kudos [?]: 190 [0], given: 11

GMAT ToolKit User GMAT Tests User
Re: A line that passes through (–1, –4) and (3, k) has a slope = [#permalink] New post 07 Dec 2012, 03:43
A line that passes through (–1, –4) and (3, k) has a slope = k. What is the value of k?

m = \frac{y2-y1}{x2-x1}
m = \frac{k-(-4)}{3-(-1)}

m = \frac{k+4}{4} & m = k

k = \frac{k+4}{4}
4k = k+4
k = 4/3

Answer: 4/3
_________________

Impossible is nothing to God.

Re: A line that passes through (–1, –4) and (3, k) has a slope =   [#permalink] 07 Dec 2012, 03:43
    Similar topics Author Replies Last post
Similar
Topics:
In the xy plane , if line K has -ve slope and passes through gmatcraze 3 23 Jul 2008, 07:36
Experts publish their posts in the topic In the xy-plane, if line k passes through the points (3,-4) puma 2 12 Jun 2008, 11:07
The slope of a line that passes through origin and S is 1/2, zelilmaze 1 08 Sep 2006, 00:59
The slope of a line that passes through origin and S is 1/2, getzgetzu 3 26 Apr 2006, 02:30
1 A line passes through (1,p), is its slope greater than 0? Vithal 11 05 Jun 2005, 17:45
Display posts from previous: Sort by

A line that passes through (–1, –4) and (3, k) has a slope =

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.