Below are the graphs of two functions, $f(x)$ and $g(x)$, defined on the domain $0\le x\le 18$:
If the graph of $f(x)$ is the dashed orange line, and the graph of $g(x)$ is the solid green line, what is the largest value of $f(x)-g(x)$?
The greatest difference between f(x) and g(x) is shown below: