Triangle END is reflected across the line y = x using the rule (x, y) - (y,x) to create triangle E'N'D'. If a line segment is drawn from point E to point
 E', which statement would best describe the line segment drawn in relation to the line y = x?
 O Both are congruent to each other.
 O Both create diameters of concentric circles.
 They are parallel.
 They are perpendicular.