From what I am noticing, linear Lagrange interpolation just looks like another way to find a secant line given two points.
What is the difference?
2026-03-27 01:44:15.1774575855
What is the difference between linear lagrange interpolation and defining secant lines?
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No difference whatsoever. For univariate data, the first order interpolating polynomial on distinct points $ x_0 < x_1$ is indeed the secant line passing through those points.