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17 Jan 2019, 03:02
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
89% (00:24) correct
11%
(00:49)
wrong
based on 66
sessions
History
Date
Time
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Not Attempted Yet
If line l is perpendicular to line k, which of the following must be true?
A. The slopes of l and k are equal.
B. The product of the slopes of l and k is 1.
C. The product of the slopes of l and k is −1.
D. The y-intercepts l and k are equal.
E. The x-intercepts of l and k are equal.
A. The slopes of l and k are equal.
B. The product of the slopes of l and k is 1.
C. The product of the slopes of l and k is −1.
D. The y-intercepts l and k are equal.
E. The x-intercepts of l and k are equal.
17 Jan 2019, 03:15
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Bunuel
For one line to be perpendicular to another, the relationship between their slopes has to be negative reciprocal −1/m. In other words, the two lines are perpendicular if and only if the product of their slopes is −1.
Hence C
Archit3110
Major Poster
17 Jan 2019, 07:32
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Bunuel
The product of the slopes of l and k is −1.
this would be true always for perpendicular lines
IMo C
