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Math: Coordinate Geometry https://gmatclub.com/forum/mathcoordinategeometry8765240.html 
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Author:  saby1410 [ 23 Aug 2020, 11:16 ] 
Post subject:  Re: Math: Coordinate Geometry 
Bunuel VeritasKarishma If the slope of a line is negative, the line WILL intersect quadrants II and IV. PLEASE EXPLAIN ME THIS PART WITH EAXAMPLE IF POSSIBLE I DIDN'T GET THIS X and Y intercepts of the line with negative slope have the same sign. Therefore if X and Y intersects are positive, the line intersects quadrant I; if negative, quadrant III. 
Author:  KarishmaB [ 25 Aug 2020, 23:13 ] 
Post subject:  Re: Math: Coordinate Geometry 
saby1410 wrote: Bunuel VeritasKarishma If the slope of a line is negative, the line WILL intersect quadrants II and IV. PLEASE EXPLAIN ME THIS PART WITH EAXAMPLE IF POSSIBLE I DIDN'T GET THIS X and Y intercepts of the line with negative slope have the same sign. Therefore if X and Y intersects are positive, the line intersects quadrant I; if negative, quadrant III. Here is a post discussing slopes and intercepts: https://www.gmatclub.com/forum/veritasprepresourcelinksnolongeravailable399979.html/2011/0 ... vertices/ Check it out. Should help resolve your doubts. 
Author:  dan0015 [ 05 Jul 2021, 23:51 ] 
Post subject:  Re: Math: Coordinate Geometry 
2. If the slope of line is positive, line WILL intersect quadrants I and III. Y and X intercepts of the line with positive slope have opposite signs. Therefore if X intersect is negative, line intersects the quadrant II too, if positive quadrant IV. Is this accurate? If x is negative and y positive, the line should be in Q4 not in Q2. 
Author:  Bunuel [ 06 Jul 2021, 00:09 ]  
Post subject:  Re: Math: Coordinate Geometry  
dan0015 wrote: 2. If the slope of line is positive, line WILL intersect quadrants I and III. Y and X intercepts of the line with positive slope have opposite signs. Therefore if X intersect is negative, line intersects the quadrant II too, if positive quadrant IV. Is this accurate? If x is negative and y positive, the line should be in Q4 not in Q2. Check the image below:

Author:  dan0015 [ 06 Jul 2021, 01:36 ] 
Post subject:  Re: Math: Coordinate Geometry 
Thanks Bunuel. Just checked again and my quadrants were numbered differently than in the OP (your Q2 is Q4 in my graph). 
Author:  Nina1987 [ 10 Sep 2021, 22:51 ] 
Post subject:  Re: Math: Coordinate Geometry 
Is the standard form Ax+By+C = 0 or Ax+By= C? I know mathematically they are exact same. But it is better to use one form as otherwise you have to flip the sign for y intercept depending on which for you are using. On the test day you don't want to thinking about this even for a split second, do u? There does not seem to be a general consensus about it among mathematicians but at least if I know which one the OGs use most frequently, I ll go with it. Thanks 
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Post subject:  Re: Math: Coordinate Geometry 
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