Functions: Relations, Domain & RangeGrade Level: 8th – 10th Grade (Algebra 1)Description: A comprehensive introduction to Functions. It covers mapping diagrams (One-to-One, Many-to-One), Function Notation $f(x)$, Domain and Range, Composite Functions $fg(x)$, Inverse Functions, and the Vertical Line Test.How to Use: This is a Unit Starter. It uses "Flow Diagrams" to visualize inputs and outputs, which is highly effective for introducing the concept of composite functions before moving to algebra