Light
A function of time describes how one quantity varies with respect to time. In this case, v(t) = 5 - 2t represents how the velocity changes as time passes.
The independent variable in a function represents the input or domain values, such as time in this case.
Dependent Variable: The dependent variable in a function represents the output or range values, such as velocity in this case.
The rate at which one quantity changes with respect to another quantity. In this problem, it relates to how velocity changes over time.