Answer:
C. (-3, -3) and (-3, 3)
Step-by-step explanation:
(-1, 1) and (1, -1)
Slope = (-1-1) / (1 - (-1))
= -2 / 2 = -1.
(-1,2) and (2,2)
Slope = ( 2-2)/ ( 2 - -2)
= 0
(-3, -3) and (-3, 3)
Slope = (3 - -3) / (-3 - (-3)
= 6 / (-3+3)
= 6/0 - UNDEFINED.
The line joining these points is vertical.
