In the xy coordinate plane, line L and K intersect at the

Oldest

Best Reply

Author

Message

TAGS:

Manager

Joined: 08 Feb 2006

Posts: 128

Followers: 1

Kudos [?]: 0 [0], given: 0

In the xy coordinate plane, line L and K intersect at the [#permalink]

20 Apr 2006, 16:37

00:00

Question Stats:

0% (00:00) correct

100% (00:00) wrong

based on 0 sessions

In the xy coordinate plane, line L and K intersect at the point (4,3). Is the product of their slopes negative?

1) The product of the x-intercepts of lines L and K is positive.

2) The product of y-intercepts of lines L and K is negative.

Senior Manager

Joined: 08 Sep 2004

Posts: 259

Location: New York City, USA

Followers: 1

Kudos [?]: 5 [0], given: 0

[#permalink]

20 Apr 2006, 16:50

B.

Since (4,3) is in 1st Q, if the two lines cut the y-axis on the opposite side of 0, their slopes will have opposite sign.

- Vipin

Senior Manager

Joined: 15 Mar 2005

Posts: 434

Location: Phoenix

Followers: 1

Kudos [?]: 7 [0], given: 0

Re: DS: Slope [#permalink]

20 Apr 2006, 17:34

jlui4477 wrote:

Case 1. The two lines have both positive or both negative x-intercepts. For the point in 1st quadrant, both negative x-intercepts mean the slopes are both +ve. However, both positive x-intercepts can mean positive or negative slopes, and hence not sufficient.

Case 2. The two lines have a positive and a negative x-intercept. The negative intercept definitely means positive slope for the line, but the positive intercept can mean positive or negative slope depending upon whether the point of intersection of the line is greater than or lower than 3. Thus, not sufficient.

Combining, we get only onc scenario. The line that has a -ve y-intercept, has a +ve x-intercept. Therefore the other line needs a +ve x-intercept. A line can have a positive x intercept and a positive y-intercept with +ve slope only.

Hence C.
_________________

Who says elephants can't dance?

Re: DS: Slope [#permalink] 20 Apr 2006, 17:34

		Similar topics	Author	Replies	Last post
Similar Topics:	2	In the xy-coordinate plane, line L and line K intersect at	Hermione	12	29 Nov 2006, 10:55
		In the xy-coordinate plane, line L and line K intersect at	gnr646	3	02 Sep 2007, 09:25
		In the xy-coordinate plane, line L and K intersect at the	jimjohn	1	26 Dec 2007, 20:03
	2	In the xy-coordinate plane, line l and line k intersect at	bsjames2	6	18 Feb 2008, 19:01
	1	In the xy-coordinate plane, line L and line K intersect at	marcodonzelli	4	10 Mar 2008, 11:52

In the xy coordinate plane, line L and K intersect at the

Main navigation

GMAT Resources

Partners

MBA Resources

GMAT ® is a registered trademark of the Graduate Management Admission Council ® (GMAC ®). GMAT Club's website has not been reviewed or endorsed by GMAC.

GMAT Courses

Admissions Consulting

In the xy coordinate plane, line L and K intersect at the

In the xy coordinate plane, line L and K intersect at the

Main navigation

GMAT Resources

Partners

MBA Resources