Activity Overview
In this activity, students study the relationship between age and near point accommodation (NPA). They predict a person's age using NPA distance values. They use exponential regression, create box-and-whisker plots and histograms.
Before the Activity
Set up the calculator for data collection using the procedure described in the attached Appendix PDF file
See the attached PDF file for detailed instructions for this activity
Print pages 87 - 96 from the attached PDF file for your class
During the Activity
Distribute the pages to your class.
Follow the Activity procedures:
Measure the closest distance between the eye and the paper when the letter on the paper remains in focus (NPA)
Record the age, and the distance between the eye and the paper
Repeat the procedure with 4 different subjects
Enter the age and NPA data as lists
Group the data for different age groups
Create a box-and-whisker plot to analyze the data
Use the graph of the exponential regression to determine the person's age based on his NPA distance
After the Activity
Students will complete the Data Collection and Analysis page 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