(CBS DETROIT) - Gas prices in Metro Detroit increased about 7 cents per gallon compared to last week's average, AAA Michigan says. 

The average price for a gallon of regular unleaded in Metro Detroit is $3.59, which is still $1.09 less than a year ago at this same time. 

Across Michigan, the price for regular unleaded is up 3 cents from a week ago, with drivers spending an average of $3.60 per gallon. 

"An increase in demand ahead of Memorial Day helped to push Michigan pump prices slightly higher," said Adrienne Woodland, AAA spokesperson. "If gas demand declines post-holiday, motorists could see some stability at the pump."  

• Most expensive gas price averages: Marquette ($3.70), Benton Harbor ($3.65), Jackson ($3.64)
• Least expensive gas price averages: Flint ($3.58), Metro Detroit ($3.59), Lansing ($3.60)