Näherungspolynom:
Grad: n-1, 2 Punkte → 1. Grad (Gerade)
Polynom: y = a₁x + a₀

P₀ = ( ; )
P₁ = ( ; )
y = x +




LGS
(Ⅰ) a₀ + a₁ =
(Ⅱ) a₀ + a₁ =

Ⅰ*=(Ⅰ)·(-A₂₁/A₁₁),→(Ⅰ)·(-a₀/a₀),→(Ⅰ)·(-1)

(Ⅰ*) -a₀ - a₁ =

Ⅰ∪=Ⅰ*+Ⅱ


(Ⅰ∪) a₁ =


a₁ =

a₁→Ⅰ

(Ⅰ) a₀ + =



a₀ =