A. 1, 5, 11, 19, 29, 41First differences: 4, 6, 8, 10, 12Second differences: 2, 2, 2, 2Quadratic
B. 1, 5, 11, 19, 29, 41First differences: 4, 6, 8, 10, 12Second differences: -2, -2, -2, -2Quadratic
C. 1, 5, 11, 19, 29, 41First differences: 2, 2, 2, 2Second differences: 4, 6, 8, 10, 12Linear
D. 1, 5, 11, 19, 29, 41First differences: -2, -2, -2, 2Second differences: 4, 6, 8, 10, 12Neither
E. 1, 5, 11, 19, 29, 41First differences: -2, 2, -2, 2Second differences: 4, 6, 8, 10, 12Linear