We have two graphs and we have to identify two specific values.
First, the value of the function f when x=4, that is f(4).
We can do this like this: finding x=4, then move along this vertical line until we match the curve for f(x). Then, move horizontally towards the y-axis to see the corresponding value of f(x).
The second value is find x when g(x)=2.
In this case, we start by finding where g(x)=2. We can do this by intersecting the line y=2 with g(x).
Although is not clear, as each division represents 5 units, we can estimate that the line y=2 intersects g(x) at its vertex
