Use the given graph to determine the open intervals on which the function is either increasing, decreasing, or constant. Enter solutions using interval notation. If no interval exists where the function is either increasing, decreasing, or constant, enter DNE.
![Use the given graph to determine the open intervals on which the function is either increasing decreasing or constant Enter solutions using interval notation If class=](https://us-static.z-dn.net/files/d8c/c4c8132f2aa86cb3953916b23c93923a.png)