PLEASE EXPLAIN. I NEED HELP GIVING POINTS !! :))

Answer:
B' is at 0,0
Step-by-step explanation:
You can determine the translation T (?, ?) by counting how far A is moved to A'. Going from A to A', you move -4 points on the x axis and +1 on the y axis.
So the translation or T is T ( -4, 1 ). Each point will now follow that same translation. Moving B 4 points to the left and 1 point upward, puts B' at 0,0.