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[数学] 求问陈向东P257第17题

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发表于 2013-11-9 18:05:04 | 显示全部楼层 回帖奖励 |倒序浏览 |阅读模式
In the xy-plane, line k is a line that does not pass through the origin. Which of the following statements individually provide sufficient additional information to determine wheter the slope of line k is negative?
其中A是The x-intercept of line k is twice the y-intercept of line k

可是截距不是绝对值吗?这怎么能判断呢?...
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