(2010 Hebei) the vertices a and B of rectangle ABCD are on the number axis, CD = 6, the number corresponding to point a is - 1, then the number corresponding to point B is -. I think it is 5 or - 7

(2010 Hebei) the vertices a and B of rectangle ABCD are on the number axis, CD = 6, the number corresponding to point a is - 1, then the number corresponding to point B is -. I think it is 5 or - 7

CD = 6 indicates that point C is greater than point D, so B has only + 5 points