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Visualisation: Visual representations of data and information

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This line graph shows how Barclays Bank share price changed with time. The horizontal axis is labelled ‘From Sep 1 2008 to Jan 29 2009’ and is marked in units of date, from September 2008 to January 2009, at intervals of 1 month. The vertical axis is not labelled and is marked in units of share price, from 50 to 450, at intervals of 50.The divisions on the vertical axis are gradually and evenly getting smaller as the share price increases up the vertical axis.

The line is a series of short straight lines joined to form a continuous line. It starts at just above 350 for September and shows a downward trend but with some sharp drops and other times when the line is horizontal or rises slightly. 2 sharper drops stand out. Between early to mid-October the price drops from 350 to 200 (approximately) where the length of the graph line showing this drop is 1.5 centimetres. Secondly between mid to end January the price drops from 200 to 50 (approximately) where the length of the graph line showing this drop is 3 centimetres.