Variables The degree of a polynomial	(P, MI)		(MA, MI)		(A, P, MA)		(A, P, MI)
	R2	RMSE (g)	R2	RMSE (g)	R2	RMSE (g)	R2	RMSE (g)
1 (Linear)	0.80	15.04	0.73	17.62	0.82	14.16	0.84	13.70
2	0.79	15.66	0.69	18.70	0.88	11.87	0.86	12.65
3	0.83	13.97	0.76	16.65	0.88	11.47	0.85	13.30