I have a data set with three columns, say, $Y$, $X_1$ and $X_2$ of which $Y$ is the dependent variable (on $X_1$ and $X_2$). I need to know how to use any software (I have MATLAB) to develop a correlation for a model in the form:
$$ f(X_1,X_2)=\frac {1+aX_1+bX_2}{1+cX_1+dX_2} $$$$ \hat Y=f(X_1,X_2)=\frac {1+aX_1+bX_2}{1+cX_1+dX_2} $$
where $a$,$b$,$c$,and $d$ are constant coefficients. Can someone help me with a step-by-step guide?