Question

Determine if lines AB and CD are parallel, perpendicular, or neither. A(-3,8), B(3,2), C(7,1), D(5,-1)

Answer 1

Answer:

Step-by-step explanation:

The slope of line AB is

$\frac{2-8}{3-(-3)} = \frac{-6}{6} = -1$

The slope of line CD is

$\frac{-1-1}{5-7} = \frac{-2}{-2} = 1$

Since the slopes multiply to $-1$, these lines are perpendicular to one another.