For another week, gas prices continue to fall across the state. Triple-A Arizona says the average price of gas in Arizona fell nearly two-cents a gallon from last week to $2.74 a gallon. In Flagstaff, prices at the pump were down a cent-and-a-half last week to $2.69 a gallon. Some stations are selling gas for $2.55 a gallon and lower. In Prescott, gas is down over four-cents a gallon to $2.84 on average. Some stations are selling gas for $2.84 and lower. Officials say lower crude oil prices and increased supply is helping the decline at the pump.