For x=0, we know that y>0
For y=0, we know that x>0
1) 2x-3y=6; x=0 => y=-2 Not the answer
2) 2x+3y=6; x=0 => y=2 May be. y=0 => x=3 May be.
3) 3x+2y=6; x=0 => y=3 May be. y=0 => x=2 May be. But in the diagram, x>2..Not the answer
4) 2x-3y=-6; x=0 => y=2 May be. y=0 => x=-3..Not the answer
5) 3x-2y=-6; x=0 => y=3 May be. y=0 => x=-2..Not the answer
Option B
Another co-geo problem!
This topic has expert replies
Source: Beat The GMAT — Problem Solving |
-
neelgandham
- Community Manager
- Posts: 1060
- Joined: Fri May 13, 2011 6:46 am
- Location: Utrecht, The Netherlands
- Thanked: 318 times
- Followed by:52 members
Anil Gandham
Welcome to BEATtheGMAT | Photography | Getting Started | BTG Community rules | MBA Watch
Check out GMAT Prep Now's online course at https://www.gmatprepnow.com/
Welcome to BEATtheGMAT | Photography | Getting Started | BTG Community rules | MBA Watch
Check out GMAT Prep Now's online course at https://www.gmatprepnow.com/
-
rijul007
- Legendary Member
- Posts: 588
- Joined: Sun Oct 16, 2011 9:42 am
- Location: New Delhi, India
- Thanked: 130 times
- Followed by:9 members
- GMAT Score:720
line l is supposed to have a negative slope.
for a line
ax + by = c
slope = -b/a
in this case...
option A,D and E are eliminated becouse there slope is positive.
now in the figue
x- intercept is longer than the y- intercept
which can be represented by the eq in option B
for a line
ax + by = c
slope = -b/a
in this case...
option A,D and E are eliminated becouse there slope is positive.
now in the figue
x- intercept is longer than the y- intercept
which can be represented by the eq in option B
Last edited by rijul007 on Tue Nov 01, 2011 6:49 am, edited 1 time in total.
-
GMATGuruNY
- GMAT Instructor
- Posts: 15539
- Joined: Tue May 25, 2010 12:04 pm
- Location: New York, NY
- Thanked: 13060 times
- Followed by:1906 members
- GMAT Score:790
Another approach:
Traveling from the y intercept to the x intercept:
Rise = -2.
Run = 3.
Thus, slope = -2/3.
Since the y intercept = 2, we get the following:
y = (-2/3)x + 2
3y = -2x + 6
2x + 3y = 6.
The correct answer is B.
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
-
shankar.ashwin
- Legendary Member
- Posts: 966
- Joined: Sat Jan 02, 2010 8:06 am
- Thanked: 230 times
- Followed by:21 members
I had posted this for a different problem, but it would help in this case as well. Looking at the line you could frame the equation.
Read the last part
https://www.beatthegmat.com/x-intercept- ... tml#417295
Read the last part
https://www.beatthegmat.com/x-intercept- ... tml#417295
-
user123321
- Master | Next Rank: 500 Posts
- Posts: 385
- Joined: Fri Sep 23, 2011 9:02 pm
- Thanked: 62 times
- Followed by:6 members
if you know intercepts then line equation is x/a + x/b = 1
so x/3+y/2 = 1 => 2x+3y = 6
user123321
so x/3+y/2 = 1 => 2x+3y = 6
user123321
Just started my preparation 
Want to do it right the first time.
Want to do it right the first time.
-
LalaB
- Master | Next Rank: 500 Posts
- Posts: 425
- Joined: Wed Dec 08, 2010 9:00 am
- Thanked: 56 times
- Followed by:7 members
- GMAT Score:690
from the pic we can see ,that our line has a negative slope.
so, A ;D; E are out. now we have only 2 choices- either B, or C.
return to the pic. we see that (3;0) is a point of this line. applying this to our two equations we can assume, that B is our answ
so, A ;D; E are out. now we have only 2 choices- either B, or C.
return to the pic. we see that (3;0) is a point of this line. applying this to our two equations we can assume, that B is our answ
-
vaibhavgupta
- Master | Next Rank: 500 Posts
- Posts: 416
- Joined: Tue Aug 30, 2011 2:18 pm
- Location: Delhi, India
- Thanked: 13 times
- Followed by:9 members
GmatKiss wrote:Please help to solve!
find slope.. and then take one of the points in the eq. y=mx+b where m=slope and b=y intercept
B it is!
If OA is A, IMO B
If OA is B, IMO C
If OA is C, IMO D
If OA is D, IMO E
If OA is E, IMO A
FML!! :/
If OA is B, IMO C
If OA is C, IMO D
If OA is D, IMO E
If OA is E, IMO A
FML!! :/
-
vaibhavgupta
- Master | Next Rank: 500 Posts
- Posts: 416
- Joined: Tue Aug 30, 2011 2:18 pm
- Location: Delhi, India
- Thanked: 13 times
- Followed by:9 members
GmatKiss wrote:Please help to solve!
find slope.. and then take one of the points in the eq. y=mx+b where m=slope and b=y intercept
B it is!
If OA is A, IMO B
If OA is B, IMO C
If OA is C, IMO D
If OA is D, IMO E
If OA is E, IMO A
FML!! :/
If OA is B, IMO C
If OA is C, IMO D
If OA is D, IMO E
If OA is E, IMO A
FML!! :/
