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In the rectangular coordinate system, lines m and n cross at

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Joined: 25 Apr 2018
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In the rectangular coordinate system, lines m and n cross at  [#permalink]

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11 Jul 2018, 01:10
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75% (00:35) correct 25% (00:24) wrong based on 4 sessions

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In the rectangular coordinate system, lines m and n cross at the origin. Is line m perpendicular to line n?

(1) m has a slope of -1 and n passes through the point (-a, -a).

(2) If the slope of m is x and the slope of n is y, then -xy = 1.

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Joined: 02 Sep 2009
Posts: 49206
Re: In the rectangular coordinate system, lines m and n cross at  [#permalink]

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11 Jul 2018, 01:13
gmat1393 wrote:
In the rectangular coordinate system, lines m and n cross at the origin. Is line m perpendicular to line n?

(1) m has a slope of -1 and n passes through the point (-a, -a).

(2) If the slope of m is x and the slope of n is y, then -xy = 1.

Discussed here: https://gmatclub.com/forum/in-the-recta ... 60368.html
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Re: In the rectangular coordinate system, lines m and n cross at &nbs [#permalink] 11 Jul 2018, 01:13
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