Respuesta :
Answer:
y- axis
Step-by-step explanation:
Under a reflection in the y- axis
a point (x, y ) → (- x, y )
Consider the corresponding vertices
A(- 1, - 1 ) → A'(1, - 1 )
B(- 2, - 1 ) → B'(2, - 1 )
C(- 2, - 4) → C'(2, - 4 )
These coordinates satisfy the condition for reflection in the y- axis