Gas prices in Arizona continue to rise. Triple-A Arizona says the average price of gas is up just over two-cents a gallon this week on average to $2.36 a gallon. In Flagstaff, gas is up two-and-a-half cents to $2.42 on average. Some stations are selling gas for $2.29 and lower. In Prescott, prices were unchanged at $2.34 a gallon. Some stations are selling gas for $2.23 and lower. Officials say prices are going up as supplies are starting to fall and demand rises.