Triangle PQR is transformed to similar triangle P′Q′R′: A coordinate plane is shown. Triangle ABC has vertices A at 2 comma 6, B at 2 comma 4, and C at 4 comma 4. Triangle A prime B prime C prime has vertices A prime at 1 comma 3, B prime at 1 comma 2, and C prime at 2 comma 2. What is the scale factor of dilation? (4 points) a 1 over 2 b 1 over 3 c 1 over 4 d 1 over 5