Go to www.hoddereducation.co.uk/wideworldextras for questions on this topic.
Line graphs are used for continuous data to show changes over time. For example, the gross domestic product (GDP) of a country could be plotted over 50 years. You can show multiple sets of data on a line graph, for example GDP for a number of countries over 50 years where each country would be shown by a different line. When describing a line graph you should refer to a trend, which is a change over time.
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