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Source: — Data Sufficiency |
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by harsh.champ » Sat Feb 06, 2010 6:27 am
abhasjha wrote:does line k intersect quad II (upper left hand quadrant)?

1) slope of K = -1/6

2) y-int of k = -6
As I had mentioned before, the slope and the intercept is required to determine the equation of a unique line.
Only knowing 1 of the 2 variables is insufficient.
Hence,the equation becomes,y=(-1/6)x -6

Hence, the answer would be C.
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by ajith » Sat Feb 06, 2010 7:17 am
abhasjha wrote:does line k intersect quad II (upper left hand quadrant)?

1) slope of K = -1/6

2) y-int of k = -6
1) slope of K = -1/6

It is not possible for a -ve sloped line not to cross second quadrant [ It may or may not intersect 3rd and 1st quadrant]

Sufficient

2) Insufficient - a positively sloped line can be framed such that it has -ve y intercept and not touch 2nd quadrant at all. similarly a -vely sloped line always passes through second quadrant

A
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