From the present question, we can determine three intervals:
1st (-5, 2)
2nd (2, 3)
3rd (3, ∞)
We can see that, for the first interval, the value of the graph maintains constant. For the second interval, the graph has its value decreasing. For the third interval, it is increasing.
From the above observation, we conclude that the graph is increasing in the following interval:
(3, ∞)