• ##### 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

3.6

Middle Grades Math: Proportionality in Tables, Graphs, and Equations
by Texas Instruments - Action Consequence, TI-Nspire Navigator Lesson

Updated on August 04, 2014

#### Objectives

• Students will recognize and identify the characteristics of proportional and non-proportional relationships by analyzing a table, equation, and graph.
• Students will identify the constant of proportionality (unit rate) in tables, graphs, equations, diagrams, and verbal descriptions of proportional relationships (CCSS).
• Students will identify the constant of proportionality (unit rate) in tables, graphs, equations, diagrams, and verbal descriptions of proportional relationships (CCSS Mathematical Practice).
• Students will model with mathematics (CCSS Mathematical Practice).

#### Vocabulary

• ratio
• slope
• y-intercept
• constant rate of change
• proportional
• non-proportional

This lesson involves analyzing changes in tables, equations, and graphs of lines to determine proportionality.
As a result, students will:

• Explore how a change in one representation affects another representation.
• Determine that a relationship is proportional if the ratio of the y-coordinate to the x-coordinate for each point on a line stays the same and the line goes through the origin.
• Determine that a relationship is non-proportional if the ratio of the y-coordinate to the x-coordinate for each point on a line is not the same and the line does not go through the origin.