Which of the following is perpendicular to y=5x? 1) y = -5x : Quant Question Archive [LOCKED]
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# Which of the following is perpendicular to y=5x? 1) y = -5x

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Senior Manager
Joined: 08 Aug 2005
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Kudos [?]: 49 [0], given: 0

Which of the following is perpendicular to y=5x? 1) y = -5x [#permalink]

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05 May 2006, 22:03
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Which of the following is perpendicular to y=5x?

1) y = -5x
2) y = 5/x
3) y = -5/x
4) y = x/5
5) y = -x/5
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Joined: 16 Aug 2005
Posts: 945
Location: France
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Kudos [?]: 23 [0], given: 0

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16 May 2006, 15:12
product of slopes for both lines should be -1

Hence (5)
16 May 2006, 15:12
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# Which of the following is perpendicular to y=5x? 1) y = -5x

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