Q = f(inputs)
this mathematical representation highlights the relationship between the quantity of inputs a firm uses and the quantity of output it produces
inputs would include your four factors of production
Total Product: the total quantity of output produced by a firm using a given quantity of inputs
Marginal Product: the additional output that is produced as a result of using one more unit of a specific input, holding other inputs constant
Average Product: the output produced per unit of input, calculated by TP/Q input
Marginal product of labor (MPL) : ∆Q/∆L
Diminishing Marginal Returns: as you keep adding more workers (or other inputs) to a fixed resource, each extra worker will eventually produce less and less extra output
TP is at maximum when MP becomes negative