[![enter image description here](https://i.stack.imgur.com/cRm51.png)](https://i.stack.imgur.com/cRm51.png)

Let the function $f$ be continuous in $[0,4]$ and differentiable in $(0,4)$. Looking at the graph I am so tempted to say that $f(2)=f(4)$ but I guess $f(2)>f(4)$ is correct. I know this is very simple but some insight is much appreciated. Thanks