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

TI-Nspire™
TI-Nspire™ CAS

• ##### TI-Nspire Version

3.9

Algebra 1: Function or Not a Function
by Texas Instruments - Action Consequence Lesson

Updated on June 12, 2015

#### 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.
• Students will use clear definitions in discussion and reasoning (CCSS Mathematical Practice).

#### Vocabulary

• function

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.