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Construct 3 yearly moving averages from the following data and show on a graph against the original…
Construct 3 yearly moving averages from the following data and show on a graph against the original data:
| Year | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 |
|---|---|---|---|---|---|---|---|---|---|---|
| Annual sales in lakhs | 18 | 22 | 20 | 26 | 30 | 22 | 24 | 28 | 32 | 35 |
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From ISC 2017 Mathematics Paper 1, question 15(b).