The graph shows the average monthly change in the prices of three metals during 2014. Summarise the information by selecting and reporting the main features, and make comparision where relevant.

The line graph gives information about the average change per month in costs of copper, nickel and zinc in 2014. From an

overall

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perspective, it can be seen clearly that three kinds of material witnessed significant fluctuation.

In addition

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, the price of these three metals remained unchanged from July to September. Looking closely at Zinc, it is evident that in February, the zinc cost had the biggest change compared to other months (solid 3%), after which its cost went down considerably to -1% in June and October. Moving to copper, it is noticeable that

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material had at least 3 stable periods, two small consistent periods were from March to April (nearly 0.5%) and from May to June (approximately -0,5%).

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, the longest one lasted 3 months from July to September (1%)

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, Nickel had a sharp decrease from 6 per cent at the beginning of the year to 1% in May,

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continuously reduced by 4% in June, before increasing unstably for the rest of the survey.