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Re: Math: Coordinate Geometry
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23 Aug 2020, 11:16
BunuelVeritasKarishma 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.
Re: Math: Coordinate Geometry
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25 Aug 2020, 23:13
Expert Reply
saby1410 wrote:
BunuelVeritasKarishma 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.
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.
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.
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
Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
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