What type of transformation happened from (x,y) --> (-x,y)?

Question

What type of transformation happened from (x,y) --> (-x,y)?

Responses

Rotation 90*
Rotation 90*

Reflection over the y axis
Reflection over the y axis

Translation left 1
Translation left 1

Reflection over the x axis

Answer 1

What type of transformation happened from (x,y) --> (-x,y)?

Reflection over the y axis happened from (x,y) --> (-x,y).