Question

which graph shows line symmetry about the y - axis?

Explanation:

A graph has line - symmetry about the y - axis if for every point (x,y) on the graph, the point (-x,y) is also on the graph. Visually, the left - hand side of the y - axis is a mirror image of the right - hand side.

Answer:

The graph where the left side of the y - axis is a mirror image of the right side of the y - axis (you would need to visually identify this among the given graphs). Since no identifiers for the graphs (like A, B, C, D) are provided, you should look for a graph such that if you were to fold the coordinate plane along the y - axis, the two halves of the graph would match up exactly.