Answer:
The graph of the function f(x) is:
Graph 4
Explanation:
We are given a function f(x) in terms of variable x as follows:

Now, when x=0 then the graph of the function f(x) must pass through:

and when x=1 then the graph of the function f(x) must pass through:

i.e. the graph of the function should pass through the points:
(0,3) and (1,2)
Now, after looking at the graph we observe that the first and second graph do not pass through (0,3).
Hence, graph 1 and graph 2 do not represent the function f(x).
Also, graph 3 pass through (0,3) but it does not pass through (1,2)
Hence, Graph 3 does not represent f(x)
Hence, the correct graph is: Graph 4