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DS: 2

by ILULA08 » Tue Aug 11, 2009 8:21 pm
Q20:
Lines k and m are parallel to each other. Is the slope of line k positive?
(1) Line k passes through the point (3, 2).
(2) Line m passes through the point (-3, 2).
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by prindaroy » Tue Aug 11, 2009 8:58 pm
The answer should be E. The best way to try and figure it out is to draw both lines and see if happens.
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by tohellandback » Tue Aug 11, 2009 9:10 pm
IMO E
you can draw two parallel lines passing through the two given points. You can rotate them simultaneously through 360 degrees and they will still be parallel and the slope can be negative or positive.
The powers of two are bloody impolite!!
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by mehravikas » Thu Aug 13, 2009 1:30 pm
IMO - E

Reason - same as above
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Re: DS: 2

by Brent@GMATPrepNow » Wed Jan 29, 2020 12:07 pm
ILULA08 wrote: ↑
Tue Aug 11, 2009 8:21 pm
 Q20:
Lines k and m are parallel to each other. Is the slope of line k positive?
(1) Line k passes through the point (3, 2).
(2) Line m passes through the point (-3, 2).
Target question: Is the slope of line k positive?

Given: Lines k and m are parallel to each other.

Let's jump straight to....

Statements 1 and 2 combined
There are many cases that satisfy BOTH statements. Here are two:

Case a:
Image
In this case, the slope of line k is POSITIVE


Case b:

Image
In this case, the slope of line k is NEGATIVE

Since we cannot answer the target question with certainty, the combined statements are NOT SUFFICIENT

Answer: E

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
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