Term	β	SE	T-value	p-value	VIF
Constant	29.005	0.389	74.56	0.000
SP	−2.1871	0.0981	−22.30	0.000	19.00
A	0.1654	0.0461	3.59	0.003	353.58
SP2	0.04994	0.00453	11.01	0.000	18.65
SP*A	−0.03721	0.00920	−4.04	0.001	353.34