Question

If f(x) is an even function, which statement about the graph of f(x) must be true?

Answer 1

if f(x) is an even function,then f(-x)=f(x)

Answer 2

Yes, that's right. But the question asks, "Which statement about the graph of f(x) must be true?" You'll still need to answer that.

Why not Google "even function?"

Answer 3

it is symmetric about Y-axis