why are polynomials multivariate why do we use multivariate polynomial regression what is the advantage of orthogonal polynomial what is multivariate orthogonal polynomial regression? which condition is best for multivariate polynomials? what is multivariate polynomial regression what is multivariate orthogonal polynomial regression what is the advantage of orthogonal regression why is polynomial regression used in multivariate regression? what is the advantage of orthogonal polynomials is multivariate orthogonal regression regresison what is the problem with multivariate linear regression which polynomial has best regression which polynomial is used for the most accurate regression what is multivariate orthogonal can we do regresison regression on single variable which type of regression is best when the coefficients are independent what is the problem with a multivariate polynomial which type of polynomials have the advantage of being orthogonal what is the function for orthogonal polynomial regression?