The graph below shows the average monthly change in the prices of three metals during 2014

The line graph illustrates the average monthly growths in price of three different metal materials in a specific year. Evidently, the data points display alternating trends on both of the items. Starting from Copper,

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material experienced a steady decline in the first half of

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period,

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in the latter half of

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duration, it displayed growth, and fixed at 1.5%

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of

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period.

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, the variation of Zinc has witnessed a converse pattern, an increase has been shown from January to February, and October to November,

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from June to October the price was relatively steady.

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, the growth of Nickel occupies the most dramatic trend. From January to March, and May to June, it respectively decreased by 5% and 3.5%, followed by a surge from October to November, and eventually stabled at 1%

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of the timeframe.

To sum up

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, the prices of the three products both experienced fluctuations, with Nickel dominating the most dramatic variation,

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the changes in Copper and Zinc were relatively steady. By the end of the year, the growths of the prices of these three materials are similar.