Answer: a reflection over the y-axis.
Step-by-step explanation:
This is a reflection, the two most common reflections are:
Over the y-axis, that transforms a point (x, y) into (-x, y)
over the x-axis, that transforms the point (x, y) into (x, -y)
Here we have the transformation from (-2, 3) to (2, 3)
So the x-component changed of sign, this coincides with a reflection over the y-axis.
So the correct answer is a reflection over the y-axis.
