Learning Resource Type

Classroom Resource

Introduction to Functions and Equations for Functions

Subject Area

Mathematics

Grade(s)

8

Overview

In this video lesson, students learn the term function for a rule that produces a single output for a given input. This lesson introduces and connects the different ways in which we represent functions in mathematics: verbal descriptions, equations, tables, and graphs. Students transition from input-output diagrams and descriptions of rules to equations. The lesson also introduces the use of independent and dependent variables in the context of functions.

Grade 8, Episode 7: Unit 5, Lessons 2 & 3 | Illustrative Math

    Mathematics (2019) Grade(s): 8

    MA19.8.13

    Determine whether a relation is a function, defining a function as a rule that assigns to each input (independent value) exactly one output (dependent value), and given a graph, table, mapping, or set of ordered pairs.

    Unpacked Content

    UP:MA19.8.13

    Vocabulary

    • Relation
    • Function
    • Input
    • Output

    Knowledge

    Students know:
    • how to interpret a graph, table, mapping, and ordered pairs.

    Skills

    Students are able to:
    • give an accurate definition of a function.
    • Analyze graphs, tables, mappings, and sets of ordered pairs to determine if a relation is a function.

    Understanding

    Students understand that:
    • Functions assign every input one output, but they may see outputs repeat.
    Link to Resource

    CR Resource Type

    Audio/Video

    Resource Provider

    PBS
    Accessibility
    License

    License Type

    CUSTOM
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