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rectangular co-ordinate system (source gmat prep)

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Re: rectangular co-ordinate system (source gmat prep)

by El Cucu » Sun Jul 12, 2009 1:06 pm
Naruto wrote:Image

In a rectangular co-ordinate system, does the line K (not shown) intersect quadrant II?

1 The slope of K = -1/6
2 The y- intercept of k is -6.


Please explain in detail
After re analyzing the problem I edited my explanation though the answer is still the same.

IMO A, negative slope will always pass through quadrant ii and iv and sometimes ii,i and iv or ii, iii, and iv. (positive slope will always pass through iii and i, sometimes iii,iv and i or iii, ii and i.)
Last edited by El Cucu on Mon Jul 13, 2009 10:03 am, edited 1 time in total.
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by kishore99 » Sun Jul 12, 2009 2:07 pm
Yes, A is correct.

A line with positive slope passes through Q1 and Q3

A line with negative slope passes though Q2 and Q4

Examples shown in the attached image.

B is insufficient, a line with y intercept -6 can pass through Q1, Q3,Q4 OR Q2, Q3, Q4 OR may be parallel to X-axis
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by Naruto » Sun Jul 12, 2009 10:50 pm
kishore99 wrote:Yes, A is correct.

A line with positive slope passes through Q1 and Q3

A line with negative slope passes though Q2 and Q4

Examples shown in the attached image.

B is insufficient, a line with y intercept -6 can pass through Q1, Q3,Q4 OR Q2, Q3, Q4 OR may be parallel to X-axis
Thanks, doubt clarified
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