Activity Overview
In this activity, students graph scatter plots to investigate possible relationships between two quantitative variables. They collect data and analyze several sets of data pairing the two quantities.
Before the Activity
See the attached PDF file for detailed instructions for this activity
Print pages 21 - 32 from the attached PDF file for your class
During the Activity
Distribute the pages to the class.
Follow the Activity procedures:
Measure the heights (cm) and the arm spans (cm) of class members
Enter the data as lists
Find the relationship between height and arm span
Graph the data as a scatter plot
Add the graph of line y = x on the scatter plot
Observe that the data points lie very close to the line y = x
Compute the ratio of arm span to height
Predict the arm span of a person of a given height, and guess the height of an individual with a given arm span
Repeat the activity with other quantitative variables
After the Activity
Students complete the Questions sheet.
Review student results:
As a class, discuss questions that appeared to be more challenging
Re-teach concepts as necessary