How to plot this graph with given table? Am I doing this right?

I am working with increasing/decreasing functions and their concavity. I am given a table and I must make a graph based on what I am given. So I made my attempt, but I don't think this is right. Can someone help me out with this? I have no function to check my work. :|

Sorry if the picture is large.. I don't know how to resize it on here.

Edit: I'm also given the following:

x-int: 0 and 4

y-int: 0

P(3) = 4

http://www.mathhelpforum.com/math-he...re818-gash.png