Last visit was: 24 Jul 2024, 14:27 It is currently 24 Jul 2024, 14:27
Toolkit
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
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

# At what point does the line ax + y + b = 0 intersect the y-axis?

SORT BY:
Tags:
Show Tags
Hide Tags
Math Expert
Joined: 02 Sep 2009
Posts: 94609
Own Kudos [?]: 643635 [14]
Given Kudos: 86737
GMAT Club Legend
Joined: 12 Sep 2015
Posts: 6804
Own Kudos [?]: 30863 [5]
Given Kudos: 799
General Discussion
Intern
Joined: 10 Feb 2016
Posts: 4
Own Kudos [?]: 266 [2]
Given Kudos: 35
Location: Finland
Concentration: General Management, Strategy
WE:Information Technology (Computer Software)
Senior Manager
Joined: 11 May 2014
Status:I don't stop when I'm Tired,I stop when I'm done
Posts: 473
Own Kudos [?]: 39435 [0]
Given Kudos: 220
GPA: 2.81
Re: At what point does the line ax + y + b = 0 intersect the y-axis? [#permalink]
Top Contributor
Bunuel wrote:
At what point does the line ax + y + b = 0 intersect the y-axis?

(1) b = 5

(2) a = 3

Lets rewrite the equation,ax+y+b=0 or,y=-ax-b

(1) When the line intersect the y axis ,we can write the equation,y=-a*0-b=-b.Since b=5,So y=-5.So the line intersects at (0,-5),Sufficient

(2) When the line intersect the y axis ,we can write the equation,y=-a*0-b=-b.here given a=3,but we don't know the value of b,Insufficient

Manager
Joined: 23 Jun 2009
Posts: 128
Own Kudos [?]: 731 [1]
Given Kudos: 138
Location: Brazil
GMAT 1: 470 Q30 V20
GMAT 2: 620 Q42 V33
Re: At what point does the line ax + y + b = 0 intersect the y-axis? [#permalink]
1
Kudos
I tend to investigate and make it the most visual possible to understand why the right answer is right and the other way round.

Posted from my mobile device

Posted from my mobile device
Attachments

Screenshot_20161203-131854.jpg [ 449.78 KiB | Viewed 10208 times ]

Director
Joined: 12 Nov 2016
Posts: 569
Own Kudos [?]: 119 [0]
Given Kudos: 167
Location: United States
Schools: Yale '18
GMAT 1: 650 Q43 V37
GRE 1: Q157 V158
GPA: 2.66
Re: At what point does the line ax + y + b = 0 intersect the y-axis? [#permalink]
Bunuel wrote:
At what point does the line ax + y + b = 0 intersect the y-axis?

(1) b = 5

(2) a = 3

This question just gives the formula for the slope of a line as ax instead of mx- just rearrange

y=-ax-b

Statement 1

The b value in y=mx +/- b is the y-intercept

Suff

Statement 2

This value is just the slope

Insuff

Thus

A
Manager
Joined: 13 Mar 2013
Posts: 135
Own Kudos [?]: 295 [0]
Given Kudos: 25
Location: United States
GPA: 3.5
WE:Engineering (Telecommunications)
Re: At what point does the line ax + y + b = 0 intersect the y-axis? [#permalink]
At what point does the line ax + y + b = 0 intersect the y-axis?

(1) b = 5

(2) a = 3

At what point does the line ax + y + b = 0 intersect the y-axis?
Means ,
X=0
so the equation becomes y+b=0
therefore y = -b

Hence we only need to know the value of B , to get the answer .

Hence statement A is sufficient .

Hi Bunuel ,
My approach is correct ? . Please confirm .

Regards,
Math Expert
Joined: 02 Sep 2009
Posts: 94609
Own Kudos [?]: 643635 [0]
Given Kudos: 86737
Re: At what point does the line ax + y + b = 0 intersect the y-axis? [#permalink]
abhisheknandy08 wrote:
At what point does the line ax + y + b = 0 intersect the y-axis?

(1) b = 5

(2) a = 3

At what point does the line ax + y + b = 0 intersect the y-axis?
Means ,
X=0
so the equation becomes y+b=0
therefore y = -b

Hence we only need to know the value of B , to get the answer .

Hence statement A is sufficient .

Hi Bunuel ,
My approach is correct ? . Please confirm .

Regards,

Yes. You could check the solutions above to check it.
Non-Human User
Joined: 09 Sep 2013
Posts: 34076
Own Kudos [?]: 853 [0]
Given Kudos: 0
Re: At what point does the line ax + y + b = 0 intersect the y-axis? [#permalink]
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Re: At what point does the line ax + y + b = 0 intersect the y-axis? [#permalink]
Moderator:
Math Expert
94609 posts