- The explanatory variable (EV) is the variable used to explain or predict another variable (the response variable).
- By convention, the explanatory variable is plotted along the x-axis of a graph, if it is numerical.
- The response variable (RV) is the variable which is explained or predicted by the explanatory variable.
- By convention, the response variable is plotted along the y-axis of a graph, if it is numerical.
Note: both explanatory and response variables can be either categorical or numerical variables.
Read More »2.1 Response and Explanatory Variables