The rectangle is the image after a dilation with the center of dilation at the origin of rectangle abcd. the pre-image of a', point a, has coordinates of (–4, 3.2). what is the scale factor of the dilation and what are the coordinates of point c? the scale factor is 2.5 and the coordinates of point c are (–2.4, –0.8). the scale factor is 0.4 and the coordinates of point c are (–2.4, –0.8). the scale factor is 2.5 and the coordinates of point c are (–15, 5). the scale factor is 0.4 and the coordinates of point c are (–15, 5).