Answer:
Neither parallel or perpendicular.
Step-by-step explanation:
For AB A(-1,-4) and B(2, 11)
x1,y1 x2,y2
Gradient = (y2 - y1)/(x2 - x1)
= (11 - (-4))/(2 - (-1))
= 15/3 = 5.
For CD C(1 , 1) and D(4 , 10)
x1, y1 x2, y2
Gradient = (y2 - y1)/(x2 - x1)
= (10 - 1)/(4 - 1)
= 9/3 = 3
from the above they are neither parallel or perpendicular.
