Gas prices may be heading up

  SEATTLE — Gasoline prices in Washington fell 4.3 cents per gallon in the week ended Sunday, Jan. 13, averaging $2.89, according to GasBuddy’s daily survey of 2,666 stations in the state.   This compares with a national average that increased 0.5 cents per gallon in the week to $2.24, according to GasBuddy.   Including the latest change,…