Question

which variable goes on the x - axis?
dependent (effect)
independent (cause)
either variable can go on the x - axis.

Explanation:

In a graph, the independent variable (cause) is typically plotted on the x - axis. The independent variable is the one that is manipulated or changed in an experiment or study. The dependent variable (effect) depends on the independent variable and is usually plotted on the y - axis. It is not correct that either variable can go on the x - axis as there is a standard convention for plotting independent and dependent variables.

Answer:

independent (cause)