Answer: line a and b are parallel line c is not perpendicular because it is not 3
step-by-step explanation: if the slope is the same it is parallel if the slope is the complete opposite it is perpendicular lines a and b are parallel with a slope of -1/3 (0, 5) (3, 4) m = 4 - 5 / 3 - 0 m = -1 / 3 m = -1/3 (-1, 1) (2, 0) m = 0 - 1 / 2 + 1 m = -1 / 3 m = -1/3 line c is perpendicular to lines a and b the slope is (0, 0) (2, 5) m = 5 - 0 / 2 - 0 m = 5/2 2.5
