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In the rectangular coordinate system, does line k intersect

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In the rectangular coordinate system, does line k intersect [#permalink] New post 25 Feb 2006, 06:47
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In the rectangular coordinate system, does line k intersect quadrant II?

1) the slope of k is -1/6
2) the y intercept of k is -6
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Re: DS # 1 [#permalink] New post 25 Feb 2006, 09:12
Professor wrote:
A.


What is your reasoning behind this answer?
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 [#permalink] New post 25 Feb 2006, 17:43
It is A. Construct the equation of the line in each case and substitute values for all variables and see if a condition x <= 0 and y > 0 is possible. If it is possible, then the line passes through second quadrant.
(1) Line equation: y = (-x/6) + c
(2) Line equation: y = mx - 6

(Equation of line is y = mx+c)
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 [#permalink] New post 25 Feb 2006, 19:26
Edited: Yes A it. I did a silly mistake thats why initially I was thinking C.
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Last edited by ps_dahiya on 25 Feb 2006, 23:11, edited 1 time in total.
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Re: DS # 1 [#permalink] New post 25 Feb 2006, 22:47
SimaQ wrote:
Professor wrote:
A.

What is your reasoning behind this answer?


any line with -ve slop has downward movement from left to right. so it you extend this line, at some point it passes through (II) quadrant.
Re: DS # 1   [#permalink] 25 Feb 2006, 22:47
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