Tori is scheduling wrestling matches for a tournament. The number of matches is determined by how many competitors are registered for the tournament.

m = the number of matches
c = the number of competitors

Which of the variables is independent and which is dependent?

In this scenario, the number of competitors (c) is the independent variable, as it is determining the number of matches (m) that will be scheduled for the tournament. The number of matches depends on the number of competitors and is therefore the dependent variable.