Answer:
Rate of change is the highest in interval 4 ≤ x ≤ 6.
Explanation:
The rate of change of a graph is defined as the slope of the graph at that point.
We have to find in which interval the the graph has the highest rate of change.
From the graph we can see that different intervals has different slopes.
From the graph we can see that the steepness of the graph is the highest in the interval 4 ≤ x ≤ 6.
Hence the rate of change is the highest in this interval.