Coordinate...

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Re: Coordinate...

by gabriel » Thu Oct 04, 2007 4:35 am
b_roy13 wrote:In the XY plan, what is the Y intercpt of line L?

A-- The slope of line L is 3 times its Y intercept.

B-- The X intercept of line L is -1/3..

Need help..
the equation of line L is y=mx+c , over here "c" is the y intercept

the first statement says m = 3c .. insufficient

the second statement says x = -1/3 , that is when y =0, x=-1/3 .. insufficient ...

combining the 2 statements, we get y = -1/3m+c =0 that is m= 3c , which pretty much repeats the information in the first statement .. so the answer is E ...
Source: — Data Sufficiency |