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Gmat_mission
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In the rectangular coordinate system, lines \(m\) and \(n\) intersect at the origin. Is line \(m\) perpendicular to line \(n?\)
(1) Line \(n\) passes through the point \((-a, -a),\) where \(a \neq 0,\) and line \(m\) has a slope of -1.
(2) The product of the slope of line \(m\) and the slope of line \(n\) is -1.
[spoiler]OA=D[/spoiler]
Source: Manhattan GMAT
(1) Line \(n\) passes through the point \((-a, -a),\) where \(a \neq 0,\) and line \(m\) has a slope of -1.
(2) The product of the slope of line \(m\) and the slope of line \(n\) is -1.
[spoiler]OA=D[/spoiler]
Source: Manhattan GMAT