Average rate of change: graphs & tables

$x$ | $f(x)$ :-: | :-: $-5$ | $-2$ $-4$ | $3$ $-3$ | $0$ $-2$ | $1$ $-1$ | $0$ $0$ | $3$ $1$ | $-7$ $2$ | $-8$ $3$ | $-3$ $4$ | $1$ $5$ | $4$ **Over which interval does $f$ have an average rate of change of zero?** [[☃ radio 1]]