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by cubicle_bound_misfit » Tue May 20, 2008 4:33 am
Hi All,

I know This has been discussed before. But the way it was explained was not clear to me. Someone please help. I was able to answer taking help of Mr. Guess. But Please let me know right methods for doing this kind of DS

Regards,
Cubicle Bound Misfit

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by luvaduva » Tue May 20, 2008 7:14 pm
This question is basically asking if the line has a negative slope.

The picture shows that a line with a negative slope will at some point intersect Quadrant 2. Note the line drawn and slide it back and forth along the grey shaded arrows. Also, if the line has a positive slope, then it must have a point in quadrant 2 for it to intersect Quadrant 2.

(1) Has negative slope. Sufficient.

(2) The y-intercept is the point (0, -6). This point is not in quadrant 2 nor do we have enough information to determine whether the slope of the line is (+) or (-). Not sufficient.

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