Segment AB is on the line y − 4 = −5(x − 1), and segment CD is on the line y − 4 = one fifth(x − 5). Which statement proves the relationship of segments AB and CD? They are perpendicular because they have slopes that are opposite reciprocals of 5 and negative one fifth. They are perpendicular because they have slopes that are opposite reciprocals of −5 and one fifth. They are parallel because they have the same slope of 5. They are parallel because they have the same slope of negative one fifth.