what is the corresponding expression for the orthogonal polynomial regression model how do you construct an orthogonal linear regression model how to construct orthogonal polynomials what is the function of zeta_2 in the orthogonal linear titration what is the zeta how to construct the polynomial regression what is sql linear polynomial what is the linear equation of orthogonal polynomialism and zeta how to construct orthogonal polynomial model what model do I have in order for an orthogonal polynomial regression? is $y_i linear or polynomial what is the function for polynomial regression? what is the order of the linear term and the quadratic term for a polynomial model zeta polynomial model how to construct an orthogonal polynomial regression where is the sum for zeta if zeta_1 is quadratic, is the answer the same as zeta_2? what is the x_i of a polynomial model how to find out which model is orthogonal can an orthogonal quadratic model be used with a linear model?