CHAPTER 2 THINKING
LIKE AN ECONOMIST 33
each country’s proportion of investment. The bar graph in panel (b) shows the interest rate set by the
European Central Bank (ECB) between January 2010 and July 2012. The interest rate is on the vertical
axis represented as a percentage and the time period is on the horizontal axis. The height of each bar
represents the interest rate. The time-series graph in panel (c) traces the unemployment rate in the
27 EU countries between 2000 and 2011. The unemployment rate as a percentage is represented on
the vertical axis and the year is on the horizontal axis. The height of the line shows the unemployment
rate each year.
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