Which variable is typically represented on the x-axis?

The independent variable is typically represented on the x-axis of a graph. This is because the independent variable is the one that is manipulated or changed in an experiment to observe its effect on another variable, known as the dependent variable. By placing the independent variable on the x-axis, it allows for a clear visualization of how changes in this variable influence the outcome, which is represented on the y-axis. This setup is fundamental in scientific research and helps in identifying relationships between variables during data analysis.

The other types of variables don’t have the same consistent representation on a graph. The dependent variable, for instance, is generally plotted on the y-axis as it is the outcome being measured. Controlled variables are those kept constant and don't typically appear on a graph in a typical x versus y representation. Random variables refer to outcomes that can occur unpredictably, and they do not fit the structured display found on an x-y coordinate system.