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08 Oct 2006, 06:37
Kudos
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N
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GMATPrep - XY co-ordinate plane DS question
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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15 Oct 2006, 13:04
Kudos
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I got C as well and here's what I did.
Slope formula is Y1-Y2/X1-X2
1) We are given that the product of the two point's x coordinates is positive. This doesn't tell us much because the two y coordinates could be positive yielding a positive slope or the two y coordinates could be negative yielding a negative slope.
2) Here we are given that the product of the y coordinates are negative. But again this doesn't tell us whether the x coordinates are positive or negative which could yield either a positive or negative slope.
3) Together we know that the X coordinates are positive and the Y coordinates are negative. Hence we can determine that the slope is indeed negative.
Hence the answer is C.
Slope formula is Y1-Y2/X1-X2
1) We are given that the product of the two point's x coordinates is positive. This doesn't tell us much because the two y coordinates could be positive yielding a positive slope or the two y coordinates could be negative yielding a negative slope.
2) Here we are given that the product of the y coordinates are negative. But again this doesn't tell us whether the x coordinates are positive or negative which could yield either a positive or negative slope.
3) Together we know that the X coordinates are positive and the Y coordinates are negative. Hence we can determine that the slope is indeed negative.
Hence the answer is C.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
