R : How to determine prediction intervals for an inverse prediction (x from y) in piecewise linear regression (Segmented)?
The function f is one-to-one on R so it is invertible. What is a (piecewise-defined) formula for its inverse function [math] f^{−1}(x) [/math]? - Quora
Range and Inverse of a Piecewise Function - YouTube
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Un-piecing and Inverting a Piecewise Function – The Math Doctors