Illuminations: Domain Representations
Illuminations (National Council of Teachers of Mathematics)

Students use graphs, tables, number lines, verbal descriptions, and symbols to represent the domain of various functions.

Inside Mathematics: 7th & 8th Grade Math – Graphs, Equations, & Tables
Inside Mathematics (The University of Texas at Austin, Charles A. Dana Center)

This lesson is intended to deepen students’ understanding of the connections between different representations of functions—graphs, t-charts, and equations.