SOLUTION: Determine which two equations represent perpendicular lines? (a) y = 4x – 8 (b) y = 1/4x + 8 (c) y = – 1/4x + 8 (d) y = 1/4x – 8 I am not coming up with any of the su

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Question 146688: Determine which two equations represent perpendicular lines?
(a) y = 4x – 8
(b) y = 1/4x + 8
(c) y = – 1/4x + 8
(d) y = 1/4x – 8
I am not coming up with any of the sulutions can you please help me out.

Answer by checkley77(12844)   (Show Source): You can put this solution on YOUR website!
A & C ARE PERPENDICULAR LINES BECAUSE THEIR SLOPES (m in the line equation Y=mX +b) ARE NEGATIVE RECIPRICALS OF EACH OTHER (4 & -1/4).
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