1. Created by: Paul Young, San Diego City College
2. Type of activity: hands on activity

3. Course level: Beginning Algebra

4. Topic: Linear Modeling

5. Materials: 1 tape measure (metric compatible) per group

6. Time required: 20+ minutes

7. Description: The main purpose of this lab is to explore the proportionality of forearm length and height. The students will record their heights and forearm lengths, first plotting on a table. Each group will plot their 12 points on the given graph paper, and then draw a "best-fit-line". Each group will be asked to give the linear equation--in both slope-intercept form as well as standard form.

8. Implementation notes (follow up/discussion questions, pedagogical recommendations, etc.): As the last question on the student write-up, each group will be asked to measure the length of the instructor's forearm. Using this information, they will have to come up with a height. Make sure each group measures your arm, as oppose to one student making the measurement for the whole class.

9. Related activities (Is this activity related to another activity found here or on a different site?)

The attached archive file contains two documents, (1) an outline of the lab and (2) the student worksheet.

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