Table 3.

Regression coefficients and mathematical equations models of response variables

Parameter	Model equations	R2	Adjusted R2
Y1	L* = 61.17*A +62.13*B +90.72*C – 50.38*A*C – 32.82*B*C	0.94	0.92
Y2	H = 49.8*A +70.05*B +4.94*C + 60.34*A*C +213.93*A*B*(A-B) + 259.77*A*C*(A-C)	0.94	0.90
Y3	Specific = 0.86*A +1.67*B +1.58*C – 2.47*A*B – 1.78*A*C +1.84*B*C + 2.96*A*B*(A-B) – 4.29*B*C*(B-C)	0.96	0.90

Model: A, corresponds the ingredients in the mixture quinoa flour, B, quinoa flakes and C, corn starch; Y3 is the model equation for L * colour response, to the response Y4 and Y5 hardness for specific volume, (p ≤ 0.05)