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Re: Math: Coordinate Geometry [#permalink]
09 Feb 2013, 03:45

HI Bunuel, As karishma has also mentioned that a line with -ve slope can also be present in 1st quadrant than how can we be so sure that it is intersecting in 2nd quadrant,

Moreover as per the theory it must intersect in 2nd and 4th quadrant ...than as per statement 1 there are two possibilities.....line intersecting in in quad 2 and 4.....But we must have only one answer form the statement, for it to be correct answer..................

Re: Math: Coordinate Geometry [#permalink]
09 Feb 2013, 03:53

Expert's post

Archit143 wrote:

HI Bunuel, As karishma has also mentioned that a line with -ve slope can also be present in 1st quadrant than how can we be so sure that it is intersecting in 2nd quadrant,

Moreover as per the theory it must intersect in 2nd and 4th quadrant ...than as per statement 1 there are two possibilities.....line intersecting in in quad 2 and 4.....But we must have only one answer form the statement, for it to be correct answer..................

Archit

No, that's not what she said.

If the slope of a line is negative, line WILL intersect quadrants II and IV in ANY case. If X and Y intersects are positives, line ALSO intersects the quadrant I, if negative line ALSO intersects the quadrant quadrant III. _________________

Since the slope is negative, the line will intersect the 2nd and 4th quadrant. We are talking about a line, not a line segment. A line extends indefinitely on both ends. The top end of the line will extend to intersect the 2nd quadrant under all circumstances.

Re: Math: Coordinate Geometry [#permalink]
10 Feb 2013, 04:16

Karishma, thats what i wanted to ask....In question it asks about whether the line is intersecting 2nd quadrant....Answer is Yes it does, but at the same time it may lie in 1st quadrant also as explained by you....I think i am badly confused on this....

Re: Math: Coordinate Geometry [#permalink]
10 Feb 2013, 04:23

Expert's post

Archit143 wrote:

Karishma, thats what i wanted to ask....In question it asks about whether the line is intersecting 2nd quadrant....Answer is Yes it does, but at the same time it may lie in 1st quadrant also as explained by you....I think i am badly confused on this....

Archit

Does it matter whether the line also lies in other quadrants? We know that it goes through the II and IV quadrants, it may also (simultaneously) go through either I or III quadrant, but this does not alter the fact that the line goes through the II, is it? So, the answer is YES. _________________

Thanks for the consolidated , yet elaborate content for the topic at one place. I would be glad , if you can tell me as to , how did you arrive at the formula for the vertex of a parabola. I find it difficult to remember formulas and if there is a easy way to arrive at the formula itself , then would prefer to know that too , so it helps in case I forget the formula. Appreciate any help on this.

Re: Math: Coordinate Geometry [#permalink]
05 Aug 2013, 10:19

Hi bunuel, firstly i want to thank for the explanations you provide to questions because most of them are pretty conceptual and healthy to understand. Secondly, i wished i was more thorough with my concepts in co-ordinate geometry specifically PARABOLA. i had seen two parabola questions when i took the test & both were quite hard unfortunately, had to end up guessing. Have yu posted any questions related to Parabola ??

Re: Math: Coordinate Geometry [#permalink]
08 Aug 2014, 21:38

Hello from the GMAT Club BumpBot!

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).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email. _________________

Re: Math: Coordinate Geometry [#permalink]
25 Nov 2014, 23:21

The angle of inclination of a line with slope 1 is 45 degrees. I know that the angle for a line of slope 2 is not 90 degree, but i do not know why not. Please help

gmatclubot

Re: Math: Coordinate Geometry
[#permalink]
25 Nov 2014, 23:21

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