Education Technology

# Activities

• ##### Subject Area

• Math: Middle Grades Math: Functions

6-8

45 Minutes

• ##### Device
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™ Navigator™
• ##### Software

TI-Nspire™
TI-Nspire™ CAS

4.4

## Definition of Functions

#### Activity Overview

This lesson involves examining relationships and functions and their inputs, outputs, domains, and ranges.

#### Objectives

• Students will determine the domain and range of relationships given as a set of ordered pairs.
• Students will determine whether or not a relationship is a function or not using the definition.
• Students will verify that relationships are functions or not by examining the relationship graphically and in a table.

#### Vocabulary

• relationship
• input
• output
• domain
• range
• function

This lesson involves examining relationships and functions and their inputs, outputs, domains, and ranges.
As a result, students will:

• Examine a relationship, determine its domain and range, and plot it on a coordinate grid.
• Examine a relationship in table form with arrows to connect inputs with their given outputs.
• Learn that a function is a rule that assigns to each input exactly one output and that the graph of a function is the set of ordered pairs consisting of an input and the corresponding output.
• Students will create their own relationships, one that is a function and one that is not.