Answer:
f(x) is even
f(x) is symmetrical about the y-axis
Step-by-step explanation:
The given function is:

A function is even if f(x) = f(-x)

Since f(-x) = f(x), the function f(x) is an even function
Also, since f(x) = f(-x), the function f(x) is symmetrical about the y-axis