Answer:
In the interval (-∞, -5)
Explanation:
Average rate of change of any graph is represented by the slope of the function in the given interval.
Rate of change =
= change in the y-coordinates
= change in the x-coordinates
If = 0, then the rate of change will be zero in that interval
From the graph attached,
From x = -∞ to x = -5, we find a flat line, showing
Therefore, average rate of change of h(x) in the interval (-∞, -5) is zero