Punto5

x = [0 1 2 3 4 5]';
y = [2.1 7.7 13.6 25.1 40.9 61.1]';
[a, r2] = regresionPolinomial(x, y, 2)

 r2  =

   0.998904

 a  =

   2.7785714
   1.5492857
   2.0107143

x = [0 1 2 3 4 5]';
y = [2.1 7.7 13.6 27.2 40.9 61.1]';
[a, r2] = regresionPolinomial(x, y, 2)

 r2  =

   0.9985094

 a  =

   2.4785714
   2.3592857
   1.8607143