The formula I = -e/T relates to electric current, defined as the rate of charge passing a point. In this context, 'I' represents current, 'Q' is charge, and 't' is time, leading to the equation I = Q/t when the rate is constant. The term '-e' denotes the charge of a single electron, indicating that the formula describes the flow of electrons. Thus, the equation quantifies the rate at which an electron, or a charge equivalent to that of one electron, moves past a specific point. Understanding this relationship is crucial for grasping the fundamentals of electric current.