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Slope of a Line

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Slope of a Line

by jayanti » Mon Aug 08, 2011 10:57 pm
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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Source: — Data Sufficiency |
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by smackmartine » Mon Aug 08, 2011 11:59 pm
IMO E

1) line k can be both +ve or -ve because it can still pass through point(3,2)--> insuff
2) line m can be both +ve or -ve because it can still pass through point(-3,2)--> insuff

Combining st 1 & 2 does n't give any information about the inclination (+\-) of the two lines, which can still be parallel and pass through the given points. -->Insuff

Note: If any other point were given through which line k or m passes, we would know the slope of both the lines.
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by abhisays » Tue Aug 09, 2011 12:06 am
The answer should be E

Just draw the points, x and y axis, you will realize.
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by smackmartine » Tue Aug 09, 2011 8:06 pm
Whats the OA?
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