what is the correct coefficient of correlation between an original and a regressor variable? what is the coefficient of polynomial regression how to select polynomial coefficient how to select polynomial multiple regression when using polynomial multiple regression how to find best correlation coefficient how to select the polynomial multiple regression which function do i use to select the polynomial multiple regression? what degree is the polynomial? why polynomial fit how to select the degree of polynomial multiple regression? how to select polynomial multiple regression which model is best linear model or polynomial? what is the optimum polynomial fitting value which polynomial degree is the best in multiple linear regression? what degree is best for polynomial multiple regression how many variables are there in a polynomial model what degree can linear regression be used how to select the degree of polynomial multiple regression can polynomial multiple regression work with original or predicted variable which quadratic equation can be used to find the correct relationship between y and a regressor variable