UNDATED (WKZO) - Michigan motorists are paying a little bit more at the pump this week. Triple-A says gas prices are up 3.3-cents per gallon over the past 7 days to a statewide average of $2.83. The average is 8.2-cents per gallon higher than at this time last year. The cheapest gas in the state is in the Traverse City area at $2.75 a gallon. The most expensive is, once again, in the Marquette area where it’s $2.89.