Table 1 Mixture compositions of mashed potatoes formulated in a constrained mixture design

Mixture	Coded values			Ingredient Proportion
	X1	X2	X2	Potato flour (%)	Milk (%)	Dextrin (%)
1	0.838	0.138	0.025	83.8	13.8	2.5
2	0.800	0.100	0.100	80.0	10.0	10.0
3	0.875	0.075	0.050	87.5	7.5	5.0
4	0.838	0.088	0.075	83.8	8.8	7.5
5	0.800	0.200	0.000	80.0	20.0	0.0
6	0.900	0.000	0.100	90.0	0.0	10.0
7	1.000	0.000	0.000	100.0	0.0	0.0
8	0.938	0.038	0.025	93.8	3.8	2.5
9	0.888	0.038	0.075	88.8	3.8	7.5