AAA Michigan says gasoline prices are up 9.3 cents per gallon over the past week to a statewide average of $2.80. The highest average can be found in the Ann Arbor area at $2.84.

The auto club said today the statewide average is 4.4 cents per gallon higher than last year at this time.

Of the cities it surveys, AAA Michigan says the cheapest price for self-serve regular fuel is in the Saginaw/Bay City area, where it's $2.74 a gallon.

Dearborn-based AAA Michigan surveys 2,800 Michigan gas stations daily.