The interpolation method is a method that allows you to find intermediate values of a value from an existing discrete set of known values.
x1
x (x1< x<x2 или x1> x>x2)
x2
f(x1)
f(x)=0.00
f(x2)
In this online calculator, linear interpolation is performed for the function f (x) if the value of x lies in the interval between x1 and x2, and the values of the function f (x1) and f (x2) are known
Therefore, the interpolation formula has the following form:
f(x)= (f(x2)-f(x1))/(x2-x1)*(x-x1)+f(x1)