Δaʹbʹcʹ is a dilation of δabc with the origin as the center of dilation. the coordinates of the vertices are as follows: a (0.3, 1.2), aʹ (1.8, 7.2) b (2.1, 3.1), bʹ (12.6, 18.6) c (3, 2.1), cʹ (18, 12.6) abc has coordinates (0.3, 1.2), (2.1, 3.1), (3, 2.1). triangle abc (each letter with prime) has coordinates (1.8, 7.2), (12.6, 18.6), (18, 12.6). determine the scale factor. what is the scale factor?