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ST: Master | Next Rank: 500 Posts; Posts: 191; Joined: Sat Feb 14, 2009 11:56 am; Thanked: 1 times

by ST » Tue May 26, 2009 4:16 pm

could someone please explain why answer is III?

ST

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Source: Beat The GMAT — Problem Solving | Tue May 26, 2009 4:16 pm

dtweah: Master | Next Rank: 500 Posts; Posts: 487; Joined: Fri Mar 27, 2009 5:49 am; Thanked: 36 times

Re: line L

by dtweah » Tue May 26, 2009 4:26 pm

ST wrote:could someone please explain why answer is III?

ST

y=mx +b

y=mx +4

0 =mx +4
x= -4/m

Since m is negative, x intercept must be a positive number. The only positive number is 6.

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