<Dl> <Dd> f (x) − f (− x) = 0 . (\ displaystyle f (x) - f (- x) = 0 .) </Dd> </Dl> <Dd> f (x) − f (− x) = 0 . (\ displaystyle f (x) - f (- x) = 0 .) </Dd> <P> Geometrically speaking, the graph face of an even function is symmetric with respect to the y - axis, meaning that its graph remains unchanged after reflection about the y - axis . </P> <P> Examples of even functions are x, x, x, cos (x), cosh (x), or any linear combination of these . </P>

The term that describes a function that is symmetric about the y-axis is