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题库 / Prep2007E1-DS-16
Lines n and p lie in the xy-plane. Is the slope of line n less than the slope of line p ?
(1) Lines n and p intersect at the point (5,1).
(2) The y-intercept of line n is greater than the y-intercept of line p.
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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（1） 不充分
（2）不知道在y的截距大小，不充分
（1）+（2）设在 Line n: （0，y1) Line p: (0,y2) y1>y2
Line n: k1= y1-1/ 0-5-->k1=y1-1/-5
Line p: k2= y2-1/ 0-5-->k2=y2-1/-5
y1-1>y2-1--> y1-1/-5
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