With Oil Near $50 a Barrel, Gas Prices Start to Inch Up
Gasoline prices head up again as price of crude oil flirts with $50 a barrel, ending unusual period this summer when gas prices fell as oil prices rose; gas prices jumped 5.1 cents in last week, to US average of $1.917 per gallon, still below record average of $2.06 in May but 33 cents higher than year ago; graph; analysts explain odd divergence in terms of supply and demand, dismissing suspicions that oil companies could be trying to influence presidential election (M)