Chart assignment
Charts to read and discuss
Read each chart, then answer its questions. Every chart shows its source and date; open it for a table of the numbers and the data to download.
Chart 1 of 2 · Interest rates
What interest rate does a 3-month Treasury bill pay?
The interactive chart needs JavaScript. The numbers are on the chart's page.
The 3-month Treasury bill rate averaged 4.05% a year in October 2026, up from 3.82% in October 2025. It moves closely with the Federal Reserve's policy rate. It peaked at 16.3% in May 1981, and was near zero in the late 1930s, from 2009 to 2015 and in 2020 and 2021. Rates are monthly averages of the rate bills traded at, on a discount basis, back to 1934.
Questions to discuss
- In one sentence of your own, what does this chart show?
- Find the biggest change or difference in the chart. What might explain it?
- Who collected these numbers, and how recent are they? What else would you want to know before drawing a conclusion?
Source: Federal Reserve Board, H.15 Selected Interest Rates (monthly averages) (Public domain (Federal Reserve Board; cite the Board as the source)) · Data as of Oct 31, 2026
Open the chart and its numbersChart 2 of 2 · World
How fast has the world come online?
The interactive chart needs JavaScript. The numbers are on the chart's page.
73.6% of the world's people used the internet in 2025, up from 15.6% in 2005, the first year the World Bank gives a world figure. It counts people who used the internet at least once in the previous three months. The world figures are estimates by the International Telecommunication Union.
How to read this chart
Each point is the share of the world's people who used the internet at least once in the previous three months, as estimated by the International Telecommunication Union. The axis starts at zero, so the height shows the true share. The steeper the line, the faster people were coming online.
Questions to discuss
- About what share of the world was online in the first year on the chart, and in the latest year?
- Did the share grow faster in some years than others? What could have sped it up?
- Using the internet once in three months counts here. What does this number leave out about how people get online?
Source: World Bank, World Development Indicators: Individuals using the Internet (% of population) (CC BY 4.0 (credit the World Bank)) · Data as of Dec 31, 2025
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