Thank you all for your responses.
After measuring the op amp with a DMM I'm not sure it works any longer. I may have burned out one of the op amps, but just in case, I have included a picture of the layout of the op amps to make sure the wiring is actually correct. I modeled it on Multisim and it appears to be correct.
I also checked the raw values using the basic analog serial read example with the arduino and the values out we fairly smooth, but when using the an "int" instead of a "float" I don't get the precision needed to make a smooth graph for my project. Using the code from my first post, I have also included a picture of the graph from the data output of the arduino without using an op amp. I would like the curve to be smooth, and the expected output is supposed to decease exponentially. Any help is greatly appreciated.