1. Automobile Trends in the Early Twentieth Century How can primary sources help us better understand the collection and interpretation of data?

2. In the early twentieth century, the design of automobiles was ever-changing… [First and ten millionth Ford].

3. … and the number of cars rolling off the production lines was increasing. [Ready to drive away].

4. We will investigate a primary source from 1927 about the automobile industry that will help us practice our graphing and estimation skills.

5. Facts and figures of the automobile industry [1927]. Page 2 of 99 Facts and figures of the automobile industry [1927]. Page 8 of 99

6. Use estimation to construct 3 graphs: 1) Year/Number 2) Year/Wholesale Value 3) Year/Value Per Unit

7. Now construct 3 graphs using the actual data: 1) Year/Number 2) Year/Wholesale Value 3) Year/Value Per Unit

8. How accurate were your estimation graphs? Do you notice anything interesting? How accurate were your estimation graphs? Do you notice anything interesting?

12. The End.