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GmatPrep?? (Slope)

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by dferm » Wed Sep 03, 2008 4:27 pm
Please Help...
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Source: — Data Sufficiency |
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Re: GmatPrep?? (Slope)

by parallel_chase » Wed Sep 03, 2008 5:41 pm
dferm wrote:Please Help...
for ax+by+c=0

slope = -a/b

Statement I & II are clearly insufficient when taken alone.

Combining I & II

x intercept = 2
y intercept = 3

slope = -2/3
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Re: GmatPrep?? (Slope)

by aspire750 » Wed Sep 03, 2008 10:23 pm
parallel_chase wrote:
dferm wrote:Please Help...
for ax+by+c=0

slope = -a/b

Statement I & II are clearly insufficient when taken alone.

Combining I & II

x intercept = 2
y intercept = 3

slope = -2/3
Although the answer is correct but explanation is flawed.

Stm1. the x-intercept of line K is 2 means it passes through (2,0)
Stm2. the y-intercept of line K is 3 means it passes through (0,3)

Slope of a line = (y2-y1)/(x2-x1)= -3/2 in this case.
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Re: GmatPrep?? (Slope)

by sudhir3127 » Thu Sep 04, 2008 4:46 am
aspire750 wrote:
parallel_chase wrote:
dferm wrote:Please Help...
for ax+by+c=0

slope = -a/b

Statement I & II are clearly insufficient when taken alone.

Combining I & II

x intercept = 2
y intercept = 3

slope = -2/3


Although the answer is correct but explanation is flawed.

Stm1. the x-intercept of line K is 2 means it passes through (2,0)
Stm2. the y-intercept of line K is 3 means it passes through (0,3)

Slope of a line = (y2-y1)/(x2-x1)= -3/2 in this case.
the slope is -3/2

X/a+Y/b =1
X/2+ Y/3 = 1
3x+2y=6

slope -a/b

-3/2.
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