## Precalculus (10th Edition)

$\text{even, odd}$
RECALL: (1) If $f(-x)=-f(x)$, then the function $f$ is odd and its graph is symmetric with respect to the origin. (2) If $f(-x)=f(x)$, then the function $f$ is even and its graph is symmetric with respect to the $y$-axis. Thus, the missing expressions in the given statement (in order) are: $\text{even}, \text{odd}$.