Which statement explains the relationship of sides ba and b'a' after rectangle badc has been rotated 90° clockwise about the origin? coordinate plane with rectangle abcd at a (3,5), b (1,3), c (5,-1), and d (7,1) side b'a' has a slope of −1 and is perpendicular to side ba. side b'a' has a slope of 1 and is parallel to side ba. side b'a' has a slope of 1 and is perpendicular to side ba. side b'a' has a slope of −1 and is parallel to side ba.