GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 20 Sep 2018, 23:09

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.

Close

Request Expert Reply

Confirm Cancel

In the xy-plane, what is the slope of the line with equation

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49275
In the xy-plane, what is the slope of the line with equation  [#permalink]

Show Tags

New post 15 Oct 2012, 04:15
2
3
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

88% (00:20) correct 12% (00:37) wrong based on 1530 sessions

HideShow timer Statistics

In the xy-plane, what is the slope of the line with equation 3x + 7y = 9 ?

(A) -7/3
(B) -3/7
(C) 3/7
(D) 3
(E) 7

Practice Questions
Question: 61
Page: 160
Difficulty: 600

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49275
Re: In the xy-plane, what is the slope of the line with equation  [#permalink]

Show Tags

New post 15 Oct 2012, 04:15
1
2
SOLUTION

In the xy-plane, what is the slope of the line with equation 3x + 7y = 9 ?

(A) -7/3
(B) -3/7
(C) 3/7
(D) 3
(E) 7

Rewrite given equation in point-intercept form: \(y=-\frac{3}{7}x+\frac{9}{7}\). The slope of this line is \(-\frac{3}{7}\).

Answer: B.

Foe more check Coordinate Geometry chapter of Math Book: math-coordinate-geometry-87652.html
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Senior Manager
Senior Manager
avatar
B
Joined: 24 Aug 2009
Posts: 476
Schools: Harvard, Columbia, Stern, Booth, LSB,
Re: In the xy-plane, what is the slope of the line with equation  [#permalink]

Show Tags

New post 15 Oct 2012, 04:27
3
The equation can be rearranged as \(y = (-3/7)x + 9/7\)
If the equation of a line is y = mx +c, the slope is m
Thus the slope of the above equation is \(-3/7\)
Answer B
_________________

If you like my Question/Explanation or the contribution, Kindly appreciate by pressing KUDOS.
Kudos always maximizes GMATCLUB worth
-Game Theory

If you have any question regarding my post, kindly pm me or else I won't be able to reply

Intern
Intern
avatar
Joined: 05 Jun 2012
Posts: 6
Re: In the xy-plane, what is the slope of the line with equation  [#permalink]

Show Tags

New post 15 Oct 2012, 07:28
2
3x + 7y = 9

7y = 9 -3x (Isolate the term 7y on one side)

y= 9/7 - 3x/7 (Divide both sides by 7)

y = mx + b => y= (-3/7)x + 9/7

m= -3/7

Answer: B
Director
Director
User avatar
Status: Done with formalities.. and back..
Joined: 15 Sep 2012
Posts: 608
Location: India
Concentration: Strategy, General Management
Schools: Olin - Wash U - Class of 2015
WE: Information Technology (Computer Software)
GMAT ToolKit User Premium Member Reviews Badge
Re: In the xy-plane, what is the slope of the line with equation  [#permalink]

Show Tags

New post 15 Oct 2012, 10:54
1
Another solution is, find points on X and Y axis where this line intersects them, by substituting x=0 and y=0 respectively in the equation of line. So two points on line found this way are (0,9/7) and (3,0)

Hence slope of line = (y2-y1)/(x2-x1) = (0-9/7)/(3-0) = -3/7

Hence ans B.

Bunuel wrote:
The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions Project

In the xy-plane, what is the slope of the line with equation 3x + 7y = 9 ?

(A) -7/3
(B) -3/7
(C) 3/7
(D) 3
(E) 7

Practice Questions
Question: 61
Page: 160
Difficulty: 600


GMAT Club is introducing a new project: The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions Project

Each week we'll be posting several questions from The Official Guide for GMAT® Review, 13th Edition and then after couple of days we'll provide Official Answer (OA) to them along with a solution.

We'll be glad if you participate in development of this project:
1. Please provide your solutions to the questions;
2. Please vote for the best solutions by pressing Kudos button;
3. Please vote for the questions themselves by pressing Kudos button;
4. Please share your views on difficulty level of the questions, so that we have most precise evaluation.

Thank you!

_________________

Lets Kudos!!! ;-)
Black Friday Debrief

Intern
Intern
avatar
Joined: 09 Sep 2012
Posts: 28
Location: United States
Re: In the xy-plane, what is the slope of the line with equation  [#permalink]

Show Tags

New post 15 Oct 2012, 23:33
2
For a general equation
ax+by+c=0

the slope is = -a/b

so it'll be -3/7

Hope it helps !!
Manager
Manager
avatar
Joined: 21 Sep 2012
Posts: 222
Re: In the xy-plane, what is the slope of the line with equation  [#permalink]

Show Tags

New post 16 Oct 2012, 03:35
2
7y=-3x + 9

the equation of a slop is y=mx+b

then y=-3/7X + 9/7

hence slope is -3/7

Answer B
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 49275
Re: In the xy-plane, what is the slope of the line with equation  [#permalink]

Show Tags

New post 19 Oct 2012, 04:05
SOLUTION

In the xy-plane, what is the slope of the line with equation 3x + 7y = 9 ?

(A) -7/3
(B) -3/7
(C) 3/7
(D) 3
(E) 7

Rewrite given equation in point-intercept form: \(y=-\frac{3}{7}x+\frac{9}{7}\). The slope of this line is \(-\frac{3}{7}\).

Answer: B.

Foe more check Coordinate Geometry chapter of Math Book: math-coordinate-geometry-87652.html

Kudos points given to everyone with correct solution. Let me know if I missed someone.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Manager
Manager
avatar
Joined: 07 Apr 2014
Posts: 115
Re: In the xy-plane, what is the slope of the line with equation  [#permalink]

Show Tags

New post 11 Sep 2014, 00:20
Bunuel wrote:
In the xy-plane, what is the slope of the line with equation 3x + 7y = 9 ?

(A) -7/3
(B) -3/7
(C) 3/7
(D) 3
(E) 7

Practice Questions
Question: 61
Page: 160
Difficulty: 600



y=mx+b
m-slope

rearrange the given eqn then m=-3/7
Target Test Prep Representative
User avatar
G
Status: Head GMAT Instructor
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2835
Re: In the xy-plane, what is the slope of the line with equation  [#permalink]

Show Tags

New post 03 Jun 2016, 06:36
Bunuel wrote:
In the xy-plane, what is the slope of the line with equation 3x + 7y = 9 ?

(A) -7/3
(B) -3/7
(C) 3/7
(D) 3
(E) 7


The easiest way to determine the slope of the line is to put the equation of the line into slope-intercept form, which is y = mx + b, where m = slope and b = the y-intercept. We must rewrite the given equation 3x + 7y = 9 to get y by itself on the left.

3x + 7y = 9

7y = -3x + 9

y = (-3/7)x + 9/7

Using the general slope-intercept form of y = mx + b, we see that the slope m = -3/7

Answer B.
_________________

Jeffery Miller
Head of GMAT Instruction

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Retired Moderator
User avatar
P
Joined: 19 Mar 2014
Posts: 962
Location: India
Concentration: Finance, Entrepreneurship
GPA: 3.5
GMAT ToolKit User Premium Member
In the xy-plane, what is the slope of the line with equation  [#permalink]

Show Tags

New post 27 Jun 2017, 14:05
In the xy-plane, what is the slope of the line with equation 3x + 7y = 9 ?

\(3x + 7y = 9\)

In order to determine the slope, we can arrange the equation in the SLOPE INTERCEPT form of the equation.

\(y = mx + b\) ===> Where m is the slope

\(3x + 7y = 9\)

\(7y = - 3x + 9\)

\(y = \frac{-3}{7} * x + \frac{9}{7}\)

Comparing above equation with \(y = mx + b\)

We get \(m = \frac{-3}{7}\)

Hence, Answer is B
_________________

"Nothing in this world can take the place of persistence. Talent will not: nothing is more common than unsuccessful men with talent. Genius will not; unrewarded genius is almost a proverb. Education will not: the world is full of educated derelicts. Persistence and determination alone are omnipotent."

Best AWA Template: https://gmatclub.com/forum/how-to-get-6-0-awa-my-guide-64327.html#p470475

Manager
Manager
User avatar
B
Joined: 09 Mar 2017
Posts: 58
Location: India
GMAT 1: 650 Q45 V31
GPA: 4
WE: Marketing (Advertising and PR)
Reviews Badge
Re: In the xy-plane, what is the slope of the line with equation  [#permalink]

Show Tags

New post 28 Dec 2017, 05:24
Hi Bunuel,

When you write difficult level say 600 Level, what is the basis of the same?
I think some questions fall around 500 level or less like these.

Thanks
Re: In the xy-plane, what is the slope of the line with equation &nbs [#permalink] 28 Dec 2017, 05:24
Display posts from previous: Sort by

In the xy-plane, what is the slope of the line with equation

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Events & Promotions

PREV
NEXT


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

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.