URGENT!!!!!!! I NEED HELP WILL GIVE BRAINLYEST FOR FIRST ANSWER

Triangle ABC is transformed with the center of dilation at the origin. Pre-image: △ABC with vertices A(−3, 4), B(−1, 12), C(4, −2) Image: △A'B'C' with vertices A'(−0.6, 0.8), B'(−0.2, 2.4), C'(0.8, −0.4) What is the scale factor of the dilation that maps the pre-image to the image?