The acronym DRY MIX is a mnemonic used to help remember how to identify and graph experimental variables:

• DRY stands for Dependent, Responding, Y-axis. This means the dependent variable is the one that responds or changes in an experiment and is plotted on the vertical (Y) axis of a graph.
• MIX stands for Manipulated, Independent, X-axis. This means the independent variable is the one that is manipulated or changed by the experimenter and is plotted on the horizontal (X) axis of a graph.

In summary, DRY MIX helps distinguish that the dependent/responding variable goes on the Y-axis, and the manipulated/independent variable goes on the X-axis