Practice Test 3

A polynomial function of at least degree 3, because the profit has two turning points (a local maximum and a local minimum).

A linear function, because it can represent the overall trend of the profit change from the start to the end of the period.

A quadratic function, because it can model a situation that increases and then decreases, capturing a single peak profit.

An exponential function, because profit models often exhibit growth that is proportional to the current profit.