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final post 1 more question help thank you guys

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Intern
Joined: 08 Jan 2007
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final post 1 more question help thank you guys [#permalink]

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07 Jan 2008, 03:03
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hi guys can you explain to me how to work this problem
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Re: final post 1 more question help thank you guys [#permalink]

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07 Jan 2008, 04:49
lets say the equation of line is

y = mx + c

so c is the y intercept of line

Now from 1
m = 3c making exation : y = 3cx + c
INSUFFICIENT

From 2
y = 0 at x intercept making x = -c/m = -1/3 therefore m = 3c SAME AS A
Again INSUFFICIENT, we want the value of c

from both

as both equation gives as exactly same info.. and none is sufficient

Ans is E
Re: final post 1 more question help thank you guys   [#permalink] 07 Jan 2008, 04:49
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final post 1 more question help thank you guys

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