I am having some trouble figuring out to find where a graph decreses and increases.

These are the directions:

Identify the intervals where the functionis changing as requested.

5. On this graph it wants to find where it is increasing. How would I find out where the graph increases?
These are the answer choices I have: a. (-3, inifity), b. (-3,3), c.(-2,2), d. (-2,inifity)

6. On this graph its wants to find where it is decreasing. How would I find out where the graph decreses?
These are the answer choices I have: a. (0,2),b.(- inifinity, 3), c.(0,3), d. ( - inifinity, -2)