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value of b

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Source: — Data Sufficiency |
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Re: value of b

by ratindasgupta » Tue Sep 04, 2007 3:09 am
tanyajoseph wrote:In the xy plane, the line with eqn., ax+by+c=0, where abc is not equal to 0, has slope 2/3. WHat is the value of b?

1) a = 4
2) c= -6
ax + by + c = 0

so y = -(a/b)x + c/b

-(a/b) = 2/3

1) a = 4. So b can be obained. SUFF

2) c = -6. Irrelevant info. INSUFF

Answer is A
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