Question

what type of symmetry does an even function have? even functions have symmetry with respect to the select.

Explanation:

By definition, an even function satisfies $f(-x) = f(x)$ for all $x$ in its domain. This means that for every point $(x, y)$ on the function's graph, the point $(-x, y)$ also lies on the graph, which corresponds to symmetry across the y-axis.

Answer:

y-axis (vertical axis)