Fig. 1. Estimates of linear (L) and quadratic (Q) effects of the whey protein concentrate and margarine variables on the measures of the cookies. A: Weight reduction; B: Yield; C: Expansion factor; D: Diameter; E: Thickness; F: Specific volume; 1Lby2L: interaction between the independent variables (1L: whey protein concentrate and 2L: margarine). The line indicates the 95% confidence level, and factors with standardized effect values to the right of the line are statistically significant.