Reflection y-axis
Here, by considering the old coordinates with the new coordinates, we want to know which of the options clearly define the type of transformation
From the question, the pattern we can identify is (x,y) turning to (-x,y)
So we want to select which of the options clearly define this transformation type
By reflection over the y-axis we can have this type of transformation
Summarily, by reflecting a point (x,y) over the y-axis, we can have the coordinates being changed to (-x,y)