Code: InterpolatingPolynomial[{{-1, 4}, {0, 2}, {1, 6}, {2,8}, {100,50}}, x]

😃 Answer

InterpolatingPolynomial[{{-1, 4}, {0, 2}, {1, 6}, {2, 8}, {100, 50}}, {-2.152, -1.328, 1.384, 3.0, -0.52, 0.72}]