• ##### 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: Toying with a Walk
by Texas Instruments - Create Your own Lesson

Updated on August 04, 2014

#### Objectives

• Students will determine the relationship between the number of "steps" a walker takes and the time it takes to make these "steps".
• Students will apply the mathematics they know to solve problems arising in everyday life, society, and the workplace (CCSS Mathematical Practice).
• Students will use functions to model relationships between quantities (CCSS Mathematical Standard).
• Students will construct a function to model a linear relationship between two quantities (CCSS Mathematical Standard).
• Students will determine the rate of change and initial value of the function from a description of a relationship, including reading these from a table or from a graph (CCSS Mathematical Standard)
• Students will interpret the rate of change and initial value of a linear function in terms of the situation it models and in terms of its graph or a table of values (CCSS Mathematical Standard).

#### Vocabulary

• function
• model
• y-intercept
• slope
• table
• mean/average
• speed
• independent variable
• dependent variable

This lesson involves collecting time data as a walker moves at a constant pace.
As a result, students will:

• Use a stopwatch built into the TI-Nspire document.
• Model the event with a function that best fits the time vs. step plot.
• Relate the real event of a walker moving at a constant speed to a linear function in the form of y = mx + b.
• Optional: Explore how the plot of time vs. distance varies from distance vs. time.