Standard - AI.F.IF.1:
Understand that a function from one set (called the domain) to another set (called the range) assigns to each element of the domain exactly one element of the range. If f is a function and x is an element of its domain, then f(x) denotes the output of f corresponding to the input x. The graph of f is the graph of the equation y = f(x).

Standard - AI.F.IF.2:
Use function notation, evaluate functions for inputs in their domains, and interpret statements that use function notation in terms of a context.

Standard - AI.F.IF.3:
Recognize that a sequence is a function whose domain is a subset of the integers.