# Activities

• • • ##### Subject Area

• Math: Algebra I: Linear Functions
• Math: Geometry: Surface Area and Volume
• Math: PreAlgebra: Linear Functions
• Science: Science General: General

• ##### Author 6-8

45 Minutes

• ##### Device
• TI-73 Explorer™
• TI-Navigator™

TI Connect™

• ##### Accessories

TI Connectivity Cable

• ##### Other Materials
This is Adventure 4 from the EXPLORATIONS Book:
Adventures in Data Collection with TI-73 Explorer™.

The following materials are required for this activity:
• , Graduated cylinder (measured in mL)
• Plastic cup
• Bottle of water
• Safety pin
• Stopwatch
• Paper towels

## A Wet Welcome Home - Adventure 4

#### Activity Overview

Students perform an experiment that simulates a leaking pipe and gather data on volume of water lost over time. They graph the data collected as a scatter plot, find the equation of the line of best fit, find the total volume of water collected, and convert units from metric to customary.

#### Before the Activity

• See the attached PDF file for detailed instructions for this adventure
• Print pages 29 from the attached PDF file for your class
• Set up the TI-Navigator™ system
• #### During the Activity

Distribute the pages to your class.

Collect Data:

• Punch a hole in a plastic cup from the inside
• Pour water from a bottle into the cup and collect the water that drips through the hole in a graduated cylinder
• Measure at 10 second intervals, the volume of water that collects in the graduated cylinder
• Plot the volume of water versus time data as a scatter plot
• Find the line of best fit and determine the equation of this line
• Calculate the number of seconds in 30 days
• For this time period, find the corresponding volume of water collected
• Convert this value from milliliter to liters and to gallons

• TI-Navigator activity:
• Display all graphs in the Activity Center
• Discuss how slope is rate of change
• #### After the Activity

Students analyze the results and answer the questions in the worksheet

Review student results:

• As a class, discuss Linear equations have constant first differences