-
crackgmat007
- Legendary Member
- Posts: 882
- Joined: Fri Feb 20, 2009 2:57 pm
- Thanked: 15 times
- Followed by:1 members
- GMAT Score:690
line l has eqn y=mx+b
in 1 m = 3b so
y = 3bx+b
in 2 0 = m(-1/3) + b
m = 3b
both a and b are insuff b/c there are 2 unknowns in each
moreover both give us the exact same information, so combining them is still insuff
therefore E
