Education Technology

# Activities

• ##### Subject Area

• Math: Algebra I: Linear Functions

9-12

60 Minutes

• ##### Device
• TI-73 Explorer™
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition

TI Connect™

• ##### Accessories

CBL™/CBL 2™
Sensor - Dual Range Force
TI Connectivity Cable
Vernier LabPro®

• ##### Other Materials
This is Activity 4 from the EXPLORATIONS Book: Real-World Math Made Easy.

The following materials are required for this activity :
• Funnel
• String
• Bucket
• Water

## Funnel Volumes: Volume and Weight

#### Activity Overview

In this activity, students' will use a force sensor to measure the weight of a water filled funnel as it drains. They analyze the weight versus time data and describe it using concepts of slope and intercepts of a linear function.

#### Before the Activity

• Connect the force sensor to Channel 1 on the CBL 2™ or Vernier LabPro®
• Connect the CBL 2 or LabPro to the calculator using the Unit-to-Unit cable
• See the attached PDF file for detailed instructions for this activity
• Print pages 29 - 36 from the attached PDF file for your class
• #### During the Activity

Distribute the pages to your class.

• Connect the force sensor to the funnel
• Block the funnel hole with a finger and fill it with water
• Begin data collection when the water in the funnel is allowed to drain gradually
• Examine the graph of weight versus time
• Calculate the slope and intercept information using any two data points and determine the equation
• Do a linear regression on all the data points and determine the regression line equation
• Compare the two equations
• Interpret what the slope represents
• #### After the Activity

Students' will analyze data, fill in the Student Data Collection and Analysis Sheet, and answer questions listed on it.

Review student results:

• As a class, discuss questions that appeared to be more challenging
• Re-teach concepts as necessary