Local Maximum/Minimum: These are points on a graph where the function reaches its highest or lowest value within a specific interval.
Absolute Maximum/Minimum: These are points on a graph where the function reaches its overall highest or lowest value across its entire domain.
Critical Point: A critical point is an input value in which either the derivative does not exist, or it equals zero. It can be a potential location for local maxima/minima, but not all critical points guarantee extrema.