Table 2. Predicted response surface quadratic models for hardness and water uptake of extruded rice snack

Responses	Model	R2 (%)	Prob>F2)
Y1 (Hardness)	Y1 = 3.033 – 0.26X1– 0.48X2– 0.29X3 + 0.29X1X2 + 0.25X1X3 + 0.14X2X3 + 0.16X12 + 0.36X2 2 + 0.33X3 2	95.81)	0.0059
Y2 (Water uptake)	Y2 = 373.66 + 15.29X1 + 30.12X2 + 19.37X3– 16.10X1X2– 13.30X1X3 – 10.44X2 X3 – 12.94X1 2 – 25.43X2 2 – 22.75X3 2	97.1	0.0026

R²; determination coefficient.
Significant at p<0.05