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

 It is currently 20 Aug 2014, 21:00

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# An unclear problem with a DS question

Author Message
TAGS:
Intern
Joined: 28 Aug 2013
Posts: 1
Followers: 0

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

An unclear problem with a DS question [#permalink]  28 Aug 2013, 19:36
00:00

Difficulty:

5% (low)

Question Stats:

50% (00:00) correct 50% (00:16) wrong based on 6 sessions
If p and q are distinct lines in the xy coordinate system such that the equation for p is y= ax + b and the equation for q is y= cx + d, is ac = a²?

(1) d = b + 2
(2) For each point (x, y) on p, there is a corresponding point (x, y + k) on q for some constant x.

I read this question in Princeton Review. In answer part, they show this:
ac = a² so a = c. But if a = 2 and c = -2, for example? I can't get it.
[Reveal] Spoiler: OA
An unclear problem with a DS question   [#permalink] 28 Aug 2013, 19:36
Similar topics Replies Last post
Similar
Topics:
DS problem 1 19 Jan 2010, 18:01
unclear referent 5 02 Feb 2008, 08:15
DS Question 1 04 Aug 2006, 13:09
DS question 16 03 Aug 2006, 17:43
1 DS question 2 08 Dec 2005, 00:25
Display posts from previous: Sort by