gmatbusters Afc0892#1:

Line L doesn't intersect with the equation y = 1-xquoting 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-1so 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 wrote:

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

Afc0892 wrote:

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.

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