Thanks for taking an interest in my power ratings Karla.
The Ratings are produced by taking into account the final scores in all games played this season and home ground advantage only. This information is imported into my computer program which then processes the data to come up with a rating for each side which will best fit the data(a form of least squares regression) It basically compares the strength of a teams win on how strong their opposition are according to the data. You will find that once the results from week 4 are added the ratings will change significantly. They wont take proper shape until about week 10. The numbers dont have any meaning but the difference in ratings between teams do. It predicts Cincinatti to be a 42 point better team than Arizona (47-5=42) which is obviously not the case but this is caused because of a lack of data. You will find that the values will become more compressed as the season unfolds. If Cincinatti was playing Arizona at home the predicted margin would be 49 and if it was away it would be 35 (allowing for a 7 point home field advantage which has been factored into the model). Predicted probabilities for matches can be evaluated from the ratings but again wont become robust until later on in the season.

Cheers
ATC