To test whether or not the population regression function is linear rather than a polynomial of order r:.A) check whether the regression R2 for the polynomial regression is higher than that of the linear regression. B) compare the TSSfrom both regressions. C) look at the pattern of the coefficients: if they change from positive to negative to positive, etc., then the polynomial regression should be used. D) use the test of (r-1) restrictions using the F-statistic.

Francisco's credit card has an apr of 28.98%, calculated on the previous monthly balance. his credit card record for the last 7 months is shown in the table below francisco is trying to figure out what this all means. answer the following questions: what is the total amount that francisco has paid in interest over the 7 months? what is the total amount that francisco has made in payments over the 7 months? how much of francisco's payments have gone to paying down the principal on his account? what is francisco's new balance at the end of month 8? what will francisco be charged for interest for month 8?