Quadratic Interpolation (2nd order, with 3 points)

v1.00 (Release date: March 20, 2024), Available in English.

Given three points P₁, P₂, P₃ with known coordinates (x₁, y₁), (x₂,y₂), (x₃,y₃), the quadratic interpolant is a second order curve which passes through these three points.
For a value x_P in the interval, the value y_P on the curve is calculated.