I'm not sure how to distinguish linear from nonlinear regression. Linear regression should be linear in the parameters. I have the doubt if the following equation can be considered as a linear regression function: $y=ax_1x_2+bx_2$, with $a$, $b$ the parameters, $x_1$, $x_2$ the independent variables and $y$ the dependent variable.
2026-02-23 14:03:20.1771855400
Is this linear regression?
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