Given the graph of f, the largest open interval on which f is increasing, and the largest open interval on which f is decreasing, can be seen below.
Explanation
We say that a function is increasing on an interval if the function values increase as the input values increase within that interval. Similarly, a function is decreasing on an interval if the function values decrease as the input values increase over that interval. The average rate of change of an increasing function is positive, and the average rate of change of a decreasing function is negative.
Answer A
[tex](0,4)[/tex]
Answer B
[tex](4,6)[/tex]
