Answer:
( 2 , -1 )
Explanation:
If you reflect coordinates across the x-axis, you change the coordinates to match ( x , -y ). If you reflect coordinates across the y-axis, you change the coordinates to match ( -x , y ).
( -2 , 1 ) gets reflected across x-axis ( x , -y ) --- ( -2 , -1 )
( -2 , -1 ) gets reflected across the y-axis ( -x , y ) --- ( 2 , -1 )