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题库 / Prep2007E1-DS-132
If l and k are lines in the xy-plane, is the product of the slopes of l and k equal to -1 ?
(1) Line l passes through the origin and the point (1, 2).
(2) Line k has x-intercept 4 and y-intercept 2.
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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