Determine which two equations represent perpendicular lines.
(a) y = 3x – 6
(b) y = 1/3x + 6
(c) y = –1/3x + 6
(d) y = 1/3x – 6
Determine which two equations represent parallel lines.
(a) y = –4x + 2
(b) y = 4x + 2
(c) y = 1/2x + 2
(d) y = –4x + 6
for question 1 a and b represent perpendicular lines because perpendicular lines always have the same equation but only with the negative reciprocals for example
y=3x-6 is the negative reciprocal for y=-1/3+6 where you change the signs and flip the slope over example 3x changes to -1/3x