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Q34: 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 â€“ 1.

Does it mean that from1- line l is parallel to given line, hence same slope?

A it is
Yes if lines dont intersect they are parallel

(1) Line l dose not intersect the line with equation y = 1 - x. (2) Line l intersects the line with equation y = x – 1.

Does it mean that from1- line l is parallel to given line, hence same slope?

Yes, if the lines do not intersect in the xy-plane, then they are parallel and have the same slope. So, (1) is sufficient: slope of L=-1 and (2) is not as there are infinite # of lines which intersects the line y=x-1.

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23 Jan 2014, 11:34

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Re: In the xy-plane, what is the slope of line l? [#permalink]

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25 Sep 2015, 11:42

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Re: In the xy-plane, what is the slope of line l? [#permalink]

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17 Dec 2015, 11:18

Does not intersect means the lines are parallel. Slopes of parallel lines are related (They are equal) Statement 1 is sufficient.

Statement 2 says the line intersects the liven equation. Had it been angle 90 degrees, we could have concluded the slope since the slope would have been equal to Slope * (-1).

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