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

The provided line graph gives information about the variations in the total monthly cost of three types of metals in 2014.

Overall

, the graph shows that the cost of metals, including zinc,copper,and nickel, fluctuated over the months, except in June, when there was a dramatic decline. From July to September, prices remained stable.

In contrast

,in

December

, most of the metals were recovered. In

January

, the change in the price of copper was 2% and slowly decreased over the months;

however

, from May to June, it remained steady.

Then

it sharply increased to 1% from July to September. The prices increased to reach almost 2% in

December

. For the

nickle

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nickel

, it was at its highest point in

January

by 6% and, over time, strongly decreased to reach 1%

in

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from

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March to April, staying at the same level. After that, it dramatically dropped to -3% in June, which is the lowest point. From July to September, it remained constant at -1%,

then

declined to -2% in October.

Moreover

, it rose sharply to 1% from November to

December

.

On the other hand

, the alteration of zinc cost was only 1% in

January

,

peaks

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peaked

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at 3% in February, and slightly

declines

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declined

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over the next four months. In

January

, it fell to -1%,

then

strongly increased from October to November until

December

, when it reached around 2%.