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lines again

by divya23 » Thu Jun 09, 2011 7:53 am
lines n and p line in xy plane is slope of line n< slope of line p
1.lines n and p intersect at (5,1)
2. the intercept y of line n is > than y int of p

both
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Source: — Data Sufficiency |
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by cans » Thu Jun 09, 2011 7:57 am
let line n be: y=nx+C1
line p be: y=px+c2
to find if n<p
a)(5,1)
5n+c1 = 5p+c2 ----eqn1
insufficient
b)c1>c2
insufficient.
a*b) c1-c2>0 -> 5p-5n>0 ->p>n
Sufficient
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by Anurag@Gurome » Sat Jun 11, 2011 3:25 am
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