Rectangular coordinate system

This topic has expert replies
User avatar
Master | Next Rank: 500 Posts
Posts: 439
Joined: 09 Aug 2008
Location: India
Thanked: 34 times
Followed by:28 members

Rectangular coordinate system

by sivaelectric » Mon Jun 06, 2011 10:47 pm
In the rectangular coordinate system, line k is defined by the equation x - 2y + n = 0. What is the value of n?

(1) The x-intercept of line k is 8.

(2) The y-intercept of line k is -4.
If I am wrong correct me :), If my post helped let me know by clicking the Thanks button ;).

Chitra Sivasankar Arunagiri

Legendary Member
Posts: 1448
Joined: 17 May 2011
Location: India
Thanked: 375 times
Followed by:53 members

by Frankenstein » Mon Jun 06, 2011 10:55 pm
Hi,
x-2y+n =0
From(1) : line pass through (8,0).So, 8+n=0
Sufficient
From(2) : line pass through (0,-4). 8+n=0
Sufficient

Hence, D
Cheers!

Things are not what they appear to be... nor are they otherwise

User avatar
Legendary Member
Posts: 1309
Joined: 04 Apr 2011
Location: India
Thanked: 310 times
Followed by:123 members
GMAT Score:750

by cans » Mon Jun 06, 2011 10:57 pm
IMO D
a)x-intercept means value of x when y=0. Thus 2 variables are known. we can find n
Sufficient
b)y-intercept means value of y when x=0. Thus 2 variables are known. we can find n
Sufficient
If my post helped you- let me know by pushing the thanks button ;)

Contact me about long distance tutoring!
[email protected]

Cans!!

User avatar
Master | Next Rank: 500 Posts
Posts: 142
Joined: 10 Jan 2011
Thanked: 19 times

by krishnasty » Tue Jun 07, 2011 8:01 am
IMO D

From 1 : line passes through (8,0). Sufficient
From 2 : line passes through (0,-4). Sufficient

User avatar
Master | Next Rank: 500 Posts
Posts: 439
Joined: 09 Aug 2008
Location: India
Thanked: 34 times
Followed by:28 members

by sivaelectric » Tue Jun 07, 2011 8:03 am
OA D
If I am wrong correct me :), If my post helped let me know by clicking the Thanks button ;).

Chitra Sivasankar Arunagiri