Answer:
A" (-6, 3)
B" (-9, 0)
C" (-5, -1)
Step-by-Step explination:
You just add 4 to x then make it negative since it is reflecting over the y-axis(the vertical line). Then add 1 to y but it stays the same after that.
Sorry kind of bad at explaining but thats the best i can do for this problem, hoped it helped...