Examine the third and fourth FRED graphs. In order to account for seasonal changes in the market price of commodities such as meat and fish the data must be Examine the third and fourth FRED graphs. In order to account for seasonal changes in the market price of commodities such as meat and fish the data must be adjusted for the impact consumer-price inflation. adjusted for the impact of economic recessions. transformed into an index with a value of 100 for the base date. transformed into a year-to-year percent growth rate