Hi, good afternoon, can you help me to solve this problem please!!

Given:-
The curve is given in the graph.
To find:-
The intervals in which the graph is decreasing.
The graph which has been given has an interval from,
[tex](-9,2)to(9,6)[/tex]So now its required to find the decreasing interval in the graph.
Decreasing interval is known as in which certain ranges the curve makes a bend direction towards the downwards.
so from the interval ranges from (-9,2) to (9,6). The bend towards downwards are in the range interval,
[tex](-9,2)to(-4,-2)[/tex]Not only the interval ranges from (-9,2) to (-4,-2) but also,
[tex](-1,6)to(4,3)[/tex]So the total interval which has decreasing interval in the given curve are (-9,2) to (-4,-2) and also (-1,6) to (4,3).