New Post: Polynomial regression mode in c#

can any one help me how to get next forecast value using Polynomial regression mode of any order
i have double[] inputs = { 61, 62, 63, 65 };

      double[] outputs = { 3.6, 3.8, 4.8, 4.1 };

and i want to get output value for 66 input
y= a1 x2 + a2 x +a3