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

The line chart illustrates the

percent

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per cent

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difference

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in monthly prices of three types of metals throughout 2014.

Overall

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, the

percent

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per cent

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difference

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in monthly price had experienced a marked decrease in two types of metals and others had slightly increased. In detail, nickel, which is the highest percentage

difference

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at the beginning of the

year

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, had decreased dramatically from 6% to the lowest point of -3% in June, before

finally

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risen

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rising

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gradually to 1%

at the end

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of the

year

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.

On the other hand

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, there was a gradual fall in Copper’s price from 2% in January, remained constant at 1% in July to September, and

then

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slightly increased to around 1.8% in December.

However

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,

while

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the other two types of metal had decreased in importance, the opposite was true in the case of Zinc. The

percent

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per cent

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difference

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in monthly price stood at 1% at the beginning of the

year

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, before

increased

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increasing

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to 2%

at the end

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of the

year

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. Zinc had reached a high of 3% in the second month, before

decreased

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decreasing

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gradually to -1% in the middle

year

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and slightly increased to the end of the

year

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.