How do i determine whether the slope is zero, undefined, or neither?
i have the coordinates,
(4, 3) and (-5, 7)
(1, 2) and ( 1, 6)
(6, 2) and ( 9, 2)
(5, -8) and (3, -8)
(8, 7) and (14, 1)
(3, 10) and (3, 5)