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In the rectangular coordinate system shown above, does line

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In the rectangular coordinate system shown above, does line [#permalink]  10 Mar 2008, 10:46
In the rectangular coordinate system shown above, does line K intersect
(1) The slope of the line is -1/6.
(2) The y-intercept of K is -6.

see figure
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figure.doc [23.5 KiB]

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Re: gmatprep coordinate geo [#permalink]  10 Mar 2008, 15:28
C

You need to know both m, slope and c, y-intercept to place a line (defined by y=mx+c) in the quadrant system.
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Re: gmatprep coordinate geo [#permalink]  15 Mar 2008, 02:03
sreehari wrote:
C

You need to know both m, slope and c, y-intercept to place a line (defined by y=mx+c) in the quadrant system.

OA is A, since slope is negative
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Re: gmatprep coordinate geo [#permalink]  15 Mar 2008, 06:27
marcodonzelli wrote:
sreehari wrote:
C

You need to know both m, slope and c, y-intercept to place a line (defined by y=mx+c) in the quadrant system.

OA is A, since slope is negative

Aah.. right, it got to cut into second quardrant somewhere!
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Re: gmatprep coordinate geo [#permalink]  15 Apr 2008, 06:41
With A...Couldn't we have two cases with a negative slope?

OR
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Re: gmatprep coordinate geo [#permalink]  15 Apr 2008, 10:44
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jimmyjamesdonkey wrote:
With A...Couldn't we have two cases with a negative slope?

OR

Case 2 will still go through quadrant II - it is an infinite line. Negative slope line always goes through quadrants II and IV.
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Re: gmatprep coordinate geo [#permalink]  15 Apr 2008, 11:16
thanks...forgot...infinite!
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Re: gmatprep coordinate geo [#permalink]  15 Apr 2008, 11:43
hi

plsssssssssss

can any one clearly describe the St: 2 pls

thanks
shobuj
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Re: gmatprep coordinate geo [#permalink]  15 Apr 2008, 20:23
shobuj wrote:
hi

plsssssssssss

can any one clearly describe the St: 2 pls

thanks
shobuj

1. y-interncept of K = -6 and slope of K negative, so k goes DOWNWARD, from II to IV. You can answer the question, yes, K go through II quandrant

2. y-interncept of K = -6 and slope of K possitive, so k goes UPWARD, from III to I quandrant. You can answer the question, NO, K does NOT go throught II quandrant.

So is SO.
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Re: gmatprep coordinate geo [#permalink]  16 Apr 2008, 03:37
Case 2 will still go through quadrant II - it is an infinite line. Negative slope line always goes through quadrants II and IV.

how can it go because if it intercept in -6 in Y axis then it can only go through 3 and 4
Re: gmatprep coordinate geo   [#permalink] 16 Apr 2008, 03:37
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