Nonlinear Data, Nonlinear Regression, Polynomial Regression, Data Transformation, Multivariate Regression.
usually represented by the polynomial of k degrees (maximum power of x). y = a x³ + b x² + c x + d Non-linear functions can have elements like exponentials, logarithms, fractions, and others. For example: y = log(x) Or even, more complicated such as : y = log(a x³ + b x² + c x + d) But what happens