Respuesta :

Answer:

see explanation

Step-by-step explanation:

Under a reflection in the y- axis

a point (x, y ) → (- x, y ) , then

A (1, 1 ) → A' (- 1, 1 )

B (2, 4 ) → B' (- 2, 4 )

C (4, 2 ) → C' (- 4, 2 )