Answer:
The coordinate for P' is ( -5,4)
Explanation:
P is at ( 3,4)
We are reflecting across the line x=-1, so the y coordinate will not change
3 is 4 units from the line of reflections3 - (-1) = 4
Subtract 4 from -1
-1 -4 = -5
The new x coordinate is -5
The coordinate for P' is ( -5,4)