Utah Core Standards
UT.8.F. FUNCTIONS (8.F)
Define, evaluate, and compare functions (Standards 8.F.1–3). Use functions to model relationships between quantities (Standards 8.F.4–5).
8.F.1. Understand that a function is a rule that assigns to each input exactly one output. The graph of a function is the set of ordered pairs consisting of an input and the corresponding output. (Function notation is not required in grade 8.)