when do you use orthogonal polynomials does r use polynomials with orthogonal polynomials? what is the purpose of orthogonal polynomials should you use polynomials when fitting regression why not use polynomial when fitting regression? why use orthogonal polynomials when regression should a polynomial be used for orthogonal regression why use orthogonal polynomial when to use orthogonal polynomial which math function can be used to fit polynomials when do r polynomials have to be orthogonal polynomials why isn't polynomial function used when to use polynomial polynomial why not use polynomial regression why orthogonal polynomials are used when to use orthogonal polynomials in r does r use polynomials what is the reason not to use polynomials why should r use orthogonal polynomials why not to use orthogonal polynomial