if 2 lines have the same slope, then they will never intersect. So this means, line l is parallel to y= 1-x. This statement is sufficient on its own.
Choose A.
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slope
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Source: Beat The GMAT — Data Sufficiency |
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bluementor
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vittalgmat
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Indeed the answer should be E.ketkoag wrote:In the xy-plane, what is the slope of line l?
(1) Line l dose not intersect the line with equation y = 1 - x.
(2) Line l intersects the line with equation y = x – 1.
My answer is E , but OA: A
I feel my answer to be 99% correct. please explain if i am wrong.
stmt 1 & 2 dont say anything specific about line L. ie. are they parallel or perpendicular. We cannot determine the slope even by combining 1 and 2.
So E it is.
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cubicle_bound_misfit
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This one is a rather sitter.
in x-y plane two lines will never intersect if and only if they are paralle i.e. their slopes are equal.
hence A is sufficient.
in x-y plane two lines will never intersect if and only if they are paralle i.e. their slopes are equal.
hence A is sufficient.
Cubicle Bound Misfit
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vittalgmat
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Super!!! u r right!!!..cubicle_bound_misfit wrote:This one is a rather sitter.
in x-y plane two lines will never intersect if and only if they are paralle i.e. their slopes are equal.
hence A is sufficient.
missed this.
If two lines are not parallel, they WILL intersect, atleast asymtotically.
But that begs a question.
If the q stem says as above, should I assume that lines are of infinite length??
Only if we assume that, we can conclude that lines are parallel.
Ian/Stuart/Brent/... Pls help.
