(page 59)

Here's a solution (with a graph!) from a group of students at Hermann Middle School in Hermann, MO:

We worked on the NY & LA problem. We compared the populations of NY and LA to see when LA would catch up with NY. We first made a table of the information. We then graphed the populations. We put the years on the X axis and the populations in millions on the Y axis. We noticed that NY's population was increasing very slowly, while LA was increasing rapidly. We then continued the slope of the lines for the next 20 years to find out an estimate population so we could compare to see if LA would catch up to NY. In 2020 we found out that LA had caught up and was ahead by 200,000.

Thank you, especially for your clear description of what you did!

Here's an extension for students who are interested: you could go to the web, to the U.S. Census site (http://www.census.gov) and see if you can get more up-to-date data (or different historical data) about the populations. Does your prediction about when LA will catch New York change when you add more data?

back to the Answer Book page