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

This

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bar graph illustrates, for the three different types of metal, the average monthly

price

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fluctuations in 2014.

Overall

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, the

price

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of copper and nickel decreased throughout the whole time frame,

while

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that of zinc increased.   Focusing on the

price

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of copper and nickel, they started with 2% and 6% changes in

price

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in comparison with the previous

month

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, respectively. The percentage of nickel experienced a significant drop by June, recording the lowest percentage at -3%. After that point, its

price

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fluctuated and recovered

at

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by

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1%

at the end

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of the

month

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.

On the other hand

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, the

price

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of copper decreased slightly by May to -0.5% and rose gradually over the next seven months, reaching under 2%.   Turning to the

price

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of zinc, its percentage was at 1% in the first

month

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.

Although

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it showed a surge of 3% the next

month

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, it experienced a downward trend until June, recording a -1%. Over the next six months, though its

price

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fluctuation was steady until October, it depicted a significant upward trend of 2% by December.