Octagon ABCDEFGH and its dilation, octagon A'B'C'D'E'F'G'H', are shown on the coordinate plane below: Octagon ABCDEFGH with ordered pairs at A at 3, 1, at B 3, negative 1, C 1, negative 3, D negative 1, negative 3, E negative 3,

If the center of dilation is at the origin, by what scale factor was octagon ABCDEFGH dilated? (4 points)

a)one half

b)2

c)4

d)one quarter