Math.
posted by Raevan on .
Determine whether the lines are parallel, perpendicular, or neither.
# 1) y = 5( 4x + 9) and y =  1/20x  4
A) Parallel
B) Perpendicular
C) Neither
#2) y = 9x + 9 and y = 9x + 9
A) Parallel
B) Perpendicular
C) Neither

1. 5(4X + 9) and Y = 1/20X 4.
Y = 20X + 45
The slopes are negative reriprocals.
Therefore, the are perpendicular.
2. Y = 9X + 9 and y = 9X + 9.
Ans: neither.