The table above shows values for a function at selected values of . Which of the following statements about best fits these data? (A) is best modeled by a linear function because the rate of change over consecutive equal-length input-value intervals is constant. (B) is best modeled by a linear function because the change in the average rates of change over consecutive equal-length input-value intervals is constant. (C) is best modeled by a quadratic function because the rate of change over consecutive equal-length input-value intervals is constant. (D) is best modeled by a quadratic function because the change in the average rates of change over consecutive equal-length input-value intervals is constant.