USA TODAY® Related Activities

USA TODAY Related Activities provides activities related to the concept of the lesson as well as up-to-date Snapshot data.

Fishy Data

Materials: calculator, grid paper for making graphs

Work alone or in a group of two or three.

The table shows the estimated number of pet fish owned in each of ten countries in 2000. These countries are the top ten owners of pet fish in the world. The table also shows the 2000 human population for each of the ten countries.

 Country Estimated Pet Fish Population Human Population China 111,477,500 1,261,832,000 United States 103,400,000 275,563,000 Germany 50,000,000 82,797,000 Japan 35,200,000 126,550,000 Italy 29,000,000 57,634,000 France 27,000,000 59,330,000 United Kingdom 26,600,000 59,508,000 Russia 20,500,000 146,001,000 Australia 12,400,000 19,165,000 Sweden 9,390,000 8,873,000
Source: Euromonitor and The World Almanac and Book of Facts

Procedure for the Activity

 Step 1 Make a bar graph that shows the pet fish population for each country. Step 2 Make a bar graph that shows the human population for each country. Step 3 Can you find a counterexample for the following statement? If so, name the counterexample. The greater the human population of a country, the greater the pet fish population. Step 4 Find the ratio of the number of people to the number of pet fish for each country. Step 5 Can you find a counterexample for the following statement? If so, name the counterexample. As the human population of the countries becomes smaller, the ratio of the number of people to the number of pet fish decreases. Step 6 Find the ratio of the number of pet fish to the number of people for each country. Step 7 Can you find a counterexample for the following statement? If so, name the counterexample. As the human population of the countries increases, the ratio of the number of pet fish to the number of people decreases. Step 3 Make a circle graph for 2002 population data. Step 4 For the graph you made in Step 3, use the categories to identify any arcs that are congruent. Step 5 Use the projected population data for 2050. Find the percent of the total world population represented by each of the seven countries or categories. Be sure to include a category named Other for the population of all other countries. Round the percents to the nearest whole number.

Wrapping Up the Activity

In this activity, you compared patterns in two data sets to determine counterexamples for given statements. Did the bar graphs help you to find counterexamples more easily? Would another type of graph have helped you more? Or, is using a table of data the easiest method for finding counterexamples? Write a paragraph describing the method that you prefer to use to find a counterexample that compares two sets of data.