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GWD 1 Q34

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GWD 1 Q34

帖子Karen » 2004-08-30 19:38

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 – 1.

ANS: A

thanks
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帖子QQcandy » 2004-09-01 00:20

As (1) indicate that Line l doesn't intersect the line with equation y=1-x, that's to say, Line l is parellel to the line w/equation y=1-x. Therefore, the slope of Line l is same as the line w/equation y=1-x.

Regarding (2), we only know Line l intersects the line with equation y=x-1 and don't know how they intersect....

so answer is "C"

Hope it's clear
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帖子 » 2004-09-01 01:32

QQcandy \$m[1]:As (1) indicate that Line l doesn't intersect the line with equation y=1-x, that's to say, Line l is parellel to the line w/equation y=1-x. Therefore, the slope of Line l is same as the line w/equation y=1-x.

Regarding (2), we only know Line l intersects the line with equation y=x-1 and don't know how they intersect....

so answer is "C" <<=== VIVIAN 是 A 吧
Hope it's clear


........

VIVIAN姐姐 妳怕大家看帖不專心 ,對唄 :P
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帖子QQcandy » 2004-09-02 00:29

(H) 呵呵...還是魚美眉了解我....
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帖子mcpopcorn2001 » 2007-06-06 22:16

不好意思

請再講解一下此題好嗎?

謝謝喔!
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帖子Yimmiwan » 2007-06-07 09:01

此題問L線的傾斜度(slope)
第一個條件是說L線不跟y=1-x這個程式的線相交,代表兩條線平行,所以L線的斜度跟y=1-x這條線一樣(就是1)
第二個條件是說L線跟y=1-x這個程式的線相交,但沒有說是如何相交(垂直,45度角等),所以無法得知L線的斜度

答案A
When one door closes another door opens; but we do often look so long and so regretfully upon the closed door, that we do not see the ones which open for us.
- Alexander Graham Bell
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