It seems that the prices for gas is lowering - somewhat - but how much and how fast?

Before Katrina struck, in RI I was paying about $2.40. Then it went up to $3.29 within a week! At least now, it is falling to about $3.10.

It went up 80 cents in a week, and only dropped 15 cents in a week? When is it going down some more?

What is it in other areas? And how much was the increase and decrease?