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moneyman: Master | Next Rank: 500 Posts; Posts: 468; Joined: Sat Mar 03, 2007 10:17 pm; Thanked: 5 times

by moneyman » Sun Oct 21, 2007 2:43 am

Lines n and p lie in the xy plane.Is the slope of line n less than the slpe of line p??

(1)Lines n and p intersect at (5,1)
(2)The y intercept of line n is greater than the y intercept of line p.

Maxx

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Source: Beat The GMAT — Problem Solving | Sun Oct 21, 2007 2:43 am

samirpandeyit62: Master | Next Rank: 500 Posts; Posts: 460; Joined: Sun Mar 25, 2007 7:42 am; Thanked: 27 times

by samirpandeyit62 » Sun Oct 21, 2007 4:20 am

Lines n and p lie in the xy plane.Is the slope of line n less than the slpe of line p??

(1)Lines n and p intersect at (5,1)

We cannot say anuything abt slope INSUFF

(2)The y intercept of line n is greater than the y intercept of line p.

Here also we can't say coz one slope may be -ve or lines may be parallel.

INSUFF

combine

eqn of n is y=m1 * x +c1

p is y=m2*x + c2

at (5,1) we ave

5m1 +c1 = 5m2 +c2

also c1 >c2

then for this to be true m1 has to be less than m2

C

Regards
Samir

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