31. The consumptlon of food in the U.5 has varled In the past decades. as shown by the data below. Let x = ii of years since 1940. Year Consumption by Billions a. Determine the ill2 value for each of following models 1950 12.4 . 1960 21.8 \"near: 1910 20.4 Quadratic: 1980 19.3 1990 24.0 Cuhlc: b. what is the best model to use? c. Haw much food was consumed in the U.S. in 1915