Part 1

You will need to measure five different people. Record your measurements on a piece of paper. Using a tape measure or ruler, measure the length (in inches) of a person's left foot and then measure the length (in inches) of that same person's forearm (between their wrist and elbow). Refer to the diagrams below. You will have two measurements for each person.

(An easy way to measure the length of a foot is to have your subject stand on a piece of paper. Then, trace their foot and measure the outline once they move off the paper.)

To measure the forearm, measure inside the arm, between the wrist and the elbow.

Part 2

Organize your data and find the rate of change.

1. Make a table of the measurements for your data. Label the forearm measurements as your input and the foot measurements as your output.
3. Select two sets of points and find the rate of change for your data.
5. Describe your results. If you had to express this relation as a verbal statement, how would you describe it?