Curvature: Curvature measures how much a curve deviates from being a straight line. Nonlinear functions typically have varying curvatures at different points.
Quadratic Function: A quadratic function is an example of a nonlinear function with a degree of 2, creating a U-shaped curve when graphed.
Exponential Growth/Decay: Exponential growth or decay functions are also nonlinear and involve rates that increase or decrease rapidly over time.