Question

line of reflection (do not use spaces!):

Explanation:

Step1: Analyze Symmetry

To find the line of reflection, we check the symmetry of the figures. The graphs are symmetric about the y - axis (x = 0) as the points on one side of the y - axis have mirror images on the other side with respect to the y - axis. For example, if we take a point (x,y) on one figure, the point (-x,y) (or related symmetric points) lies on the other figure, which is characteristic of reflection over the y - axis (x = 0).

Answer:

x = 0