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DS-x y plane------OG Diag No 39

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Source: — Data Sufficiency |
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by GID09 » Mon Aug 03, 2009 2:06 pm
If I substitute the given points in line eqn y= mx+c, I get r =-5m+c

Now, st 1 says slope is -5 -> r =-25+c ..Insufficient
St 2 says r >0, but we don't know the slope.

Combining 1 & 2 ...+r=-25+c...sufficient. Hence C.

GID09
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by yogami » Mon Aug 03, 2009 4:25 pm
r = -5m + c

(1) slope is -5 so r = (-5)*(-5) + c = 25 + c and this is clearly insufficient
(2) r > 0 which means -5m + c > 0 which mean c > 5m and this is insuff

Combining we get
25 + c > 0 which is c > -25. And this is clearly insufficient
So IMO its E
200 or 800. It don't matter no more.
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by nitya34 » Mon Aug 03, 2009 10:48 pm
OA--E
Many of the great achievements of the world were accomplished by tired and discouraged men who kept on working.
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