Similar to f(x), g(y) represents another function where y is the input and g(y) is the output. It also shows the relationship between the input and output values of a mathematical expression.
A combination of two or more functions, where one function's output becomes another function's input.
A function that "undoes" another function, swapping its inputs with outputs.
Transformations: Modifying functions by shifting, stretching, or reflecting them on a coordinate plane.