In this context, g is the independent variable and u is the dependent variable.
Step-by-step explanation:
A variable is classified as the independent variable if its value is being controlled or manipulated. Conversely, a variable is classified as the dependent variable if its value is being observed or measured. In this context, based on the given statements, it is clear that g is the independent variable and u is the dependent variable.
Therefore, the correct options are: g is the independent variable and u is the dependent variable.