Question

edna works as a server at the webster restaurant. the more tables she is assigned to serve, the more money she earns during a shift.

t = the number of tables edna serves
m = the amount of money edna earns

which of the variables is independent and which is dependent?
m is the independent variable and t is the dependent variable
t is the independent variable and m is the dependent variable

Explanation:

The amount of money Edna earns ($m$) depends on the number of tables she serves ($t$). The number of tables she serves can vary independently, and based on that, her earnings change. So, the number of tables ($t$) is the independent variable that can be freely set or changed, and the amount of money earned ($m$) is the dependent variable that is affected by the value of the independent variable.

Answer:

t is the independent variable and m is the dependent variable