Linear interpolation - Wikipedia
https://en.wikipedia.org/wiki/Linear_interpolationLinear interpolation has been used since antiquity for filling the gaps in tables. Suppose that one has a table listing the population of some country in 1970, 1980, 1990 and 2000, and that one wanted to estimate the population in 1994. Linear interpolation is an easy way to do this. It is believed that it was used in the Seleucid Empire (last three centuries BC) and by the Greek astronomer and mathematician Hipparchus(second century BC). A description of linear interpola…
Linear interpolation - Wikipedia
en.wikipedia.org › wiki › Linear_interpolationMethod of curve fitting to construct new data points within the range of known data points. Given the two red points, the blue line is the linear interpolant between the points, and the value y at x may be found by linear interpolation. In mathematics, linear interpolation is a method of curve fitting using linear polynomials to construct new ...