Chapter 19 Case Study 1

The Scenario

Dairy Production: As a dairy science assistant in the United States Department of Agriculture, it is your job periodically to help produce a document that gives an overall view of the need for continued monetary support from the Congress. Part of that report is to include data which show that past efforts by the Dairy Division are paying off in terms of increased production. While you are going to detail these programs later in the report, you want a strong visual aid at the beginning of the report to clarify the success of the American dairy farmer.

The Task

Using the following data, decide what type of graph would be most effective as an illustration of increased milk production over the past twenty years and create it.

Year	Number of U.S. Dairy Cows in Millions	Gallons of Milk per Cow
1970	12	1,134
1975	11.5	1,220
1980	11.2	1,388
1985	10.5	1,510
1990	10.2	1,703