noun. 1  a type of structure of an organism or part of an organism in which a vertical cut through the axis in any of two or more planes produces two halves that are mirror images of each other.2  Compare bilateral symmetry. Trends. 2  a type of structure of an organism or part of an organism in which a vertical cut through the axis in any of two or more planes produces two halves that are mirror images of each other.
There is a standard method for graphing the independent and dependent variable. The x-axis is the independent variable, while the y-axis is the dependent variable. You can use the DRY MIX acronym to help remember how to graph variables: DRY MIX.
6 Chapter 13. Independent of irrelevant alternatives: For x;y2 B, x B yif andonly if x A y.Because of the third property, we need not specify the choice set and cansimply write x y. We also make the behavioral assumption that givenany choice set A, the individualchooses an element x2 Asuch that for ally2 A, x y.