Answer:
See below
Explanation:
You are trying to find a line that the preimage point and the image point are the same distance from the line.
Look at A and A' . If you start at A the distance to A' is 12 up and 4 right. What is half of that? 6 up and 2 right.
The distance between B and B' is 6 down and 2 left. Half of that is 3 down and 1 left.
The distance between C and C' is 12 down and 4 left. Half of that is 6 down and 2 left. I graphed those three points and then drew the line.
Helping in the name of Jesus.