Gas prices in Maine continue to rise, but at a slower rate than the nation as a whole. Price-monitoring website MaineGasPrices.com reports Monday that in-state prices ticked up a little more than a penny in the past week, to an average of $3.84 per gallon. Nationally, prices rose almost three cents to about $3.72 per gallon. The cost of gas in Maine is now seven cents per gallon higher than this time last year and 29 cents higher than a month ago. Nationally, prices have jumped 42 cents per gallon in the last month. A company analyst says prices may linger at current levels for some time.