Answer:
A
Step-by-step explanation:
The line with equation y = 0 , is the x- axis
Under a reflection in the x- axis
a point (x, y ) → (x, - y ), then
A (1, 1 ) → A' (1, - 1 )
B (4, 1 ) → B' (4, - 1 )
C (3, 3 )→ C' (3, - 3 )
Which are the coordinates of Δ A'B;C' in diagram A
Thus diagram A represents the reflection of Δ ABC in the line y = 0
