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20 Jan 2019, 08:59
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A
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Difficulty:
25%
(medium)
Question Stats:
64% (00:47) correct
36%
(00:58)
wrong
based on 107
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In the XY plane. What is the slope of line L?
a) Line L doesn't intersect with the equation y = 1-x.
b) Line L intersect with the equation y = x-1.
a) Line L doesn't intersect with the equation y = 1-x.
b) Line L intersect with the equation y = x-1.
20 Jan 2019, 09:23
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Statement 1:
2 lines will not intersect only if both are parallel to each other.
Hence the Line L is parallel to y = 1-x. hence slope of L is same as slope of y = 1-x = -1.
Sufficient.
Statement2:
Line L can intersect in any inclination with line y = 1-x.
Hence Not sufficient.
Answer = A
2 lines will not intersect only if both are parallel to each other.
Hence the Line L is parallel to y = 1-x. hence slope of L is same as slope of y = 1-x = -1.
Sufficient.
Statement2:
Line L can intersect in any inclination with line y = 1-x.
Hence Not sufficient.
Answer = A
Afc0892
Archit3110
Major Poster
25 Jan 2019, 03:09
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gmatbusters Afc0892
#1:
Line L doesn't intersect with the equation y = 1-x
quoting your line :
2 lines will not intersect only if both are parallel to each other.
how can we say that line L would be parallel to y=1-x ; ? what if they are in opposite quadrants , upon drawing line y=1-x (0,1), ( 1,0) we would notice its a downward slope (-ve) .. so for a line which doesnt intersect with eqn y=1-x will not necessarily be parallel IMO A is not sufficient..
#2
given Line L intersect with the equation y = x-1
so for a line which intersects with another line it would be perpendicular and product of their slopes would be -1 ;
IMO B should be sufficient
#1:
Line L doesn't intersect with the equation y = 1-x
quoting your line :
2 lines will not intersect only if both are parallel to each other.
how can we say that line L would be parallel to y=1-x ; ? what if they are in opposite quadrants , upon drawing line y=1-x (0,1), ( 1,0) we would notice its a downward slope (-ve) .. so for a line which doesnt intersect with eqn y=1-x will not necessarily be parallel IMO A is not sufficient..
#2
given Line L intersect with the equation y = x-1
so for a line which intersects with another line it would be perpendicular and product of their slopes would be -1 ;
IMO B should be sufficient
gmatbusters
