Question 148188
answer: b and c

b)y=3x-4/9

c)y=-1/3x+4/9


Why? because their slopes are negative reciprocals of each other.


Slopes--  3x and -1/3x.


3x reciprocal: 1/3x
negative: -1/3x


-1/3x reciprocal: -3x
negative: 3x


If the slopes are negative reciprocals of each other, then the lines are perpendicular. Always.