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题库 / GMATAdvanced-DS-42
In the standard (x, y) coordinate plane, what is the slope of the line containing the distinct points P and Q?
(1)Both P and Q lie on the graph of |x|+|y| =1
(2)Both P and Q lie on the graph of |x+y|=1
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
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含有绝对值的直线，需要画图辅助求解
（1）|x|+|y| =1图像是个菱形，pq两个点可以在任何线上，斜率不固定
（2）|x+y|=1图形是两条平行的直线，pq只要在不同的直线上斜率就不固定
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