Education Technology

# Activities

• ##### Subject Area

• Math: Algebra I: Functions and Relations

9-12

50 Minutes

• ##### Device
• TI-Nspire™
• TI-Nspire™ CAS
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™ Navigator™
• TI-Nspire™ Apps for iPad®
• ##### Software

TI-Nspire™
TI-Nspire™ CAS

3.9

## Function or Not a Function

#### Activity Overview

Examine some input-output relations to determine if a relation is a function.

#### Objectives

• Students will understand the definition of function and use it to identify whether or not an input-output pairing represents a function.
• Students will determine if a graph represents a function by using a moving vertical line.
• Students will determine if a table of x- and y-values represents a function.

• function

#### About the Lesson

In this lesson, students are presented with graphs and tables and asked to determine which represent functions and which do not. A function associates exactly one output value y with each possible input value x. If more than one output value y is associated with a single input value x, that process does not describe a function.