In the xy-plane, what is the slope of line l?
1. Line l does not intersect the line with equation y=1-x
2. Line l intersects the line with equation y=x-1
xy-plane
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- nileshpadwal
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My answer is A
1. As the line doesn't intersect the line the line is parallel to l, so the slopes will be same
Statement 1 alone sufficient
2. As line intersect l, the line is not parallel. We can not derive slope of line l.
1. As the line doesn't intersect the line the line is parallel to l, so the slopes will be same
Statement 1 alone sufficient
2. As line intersect l, the line is not parallel. We can not derive slope of line l.
- sgmuthukumar
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The question is not clear .. Is this DS a question ?
Here the line l is parallel to the line y=1-x and hence the slope should be negative
Here the line l is parallel to the line y=1-x and hence the slope should be negative
- fatalityish
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The answer as said by nilesh is indeed A.
Solution:-
Concepts Required:
1. The simplest of an equation of a line is y = mx + c
where m is the slope and c is the intercept on y-axis (i.e. the point at which the line meets the y-axis)
2. Parallel lines have same slope.
3. If 2 or more lines do not intersect then they are parallel lines.
Since this is a DS question and we have to find the slope of the line l.
Option 1
We know that l and l' (assume l' => y=1-x) are parallel. hence slope of l and l' are the same.
l' can be rewritten as y = (-1)*x + 1;
hence from the equation of line slope = -1.
Option 1 is sufficient.
Option 2
Lines l and l"(assume l" => y=x-1) intersects. Using this information we can only know that the line l and line l" have one point in common, which again has infinite possibilities.
Hence this is insufficient information.
Therefore Option 1 alone is sufficient to answer the problem and not option 2.
Solution:-
Concepts Required:
1. The simplest of an equation of a line is y = mx + c
where m is the slope and c is the intercept on y-axis (i.e. the point at which the line meets the y-axis)
2. Parallel lines have same slope.
3. If 2 or more lines do not intersect then they are parallel lines.
Since this is a DS question and we have to find the slope of the line l.
Option 1
We know that l and l' (assume l' => y=1-x) are parallel. hence slope of l and l' are the same.
l' can be rewritten as y = (-1)*x + 1;
hence from the equation of line slope = -1.
Option 1 is sufficient.
Option 2
Lines l and l"(assume l" => y=x-1) intersects. Using this information we can only know that the line l and line l" have one point in common, which again has infinite possibilities.
Hence this is insufficient information.
Therefore Option 1 alone is sufficient to answer the problem and not option 2.