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

The provided graph compares the changes in the costs of

Copper

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,

Nickel

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and Zinc in all months

in

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of

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2014.

According to

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the provided data, the costs of

Copper

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and

Nickel

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almost remained the same at the beginning and end of the studied period,

while

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cost

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the cost

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of Zinc experienced a sharp negative change

at the end

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of the studied period. In January 2014,

Copper

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and

Nickel

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saw a 2% and a 1%

changes

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change

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respectively, considering some fluctuations their prices diminished and led to about a -1% fall in July. After that, the costs of

Copper

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and

Nickel

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experienced an upward trend until September reaching +1% and about 0% growth respectively. After a slight decrease in October, their prices saw about a 2% growth in December.

On the other hand

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, the change in Zinc was at a positive peak of 6% in January,

however

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, it started to decrease up to July and reached

to

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apply

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the least price by a -3% reduction. After July,

although

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prices’ changes had an upward trend, they were negative until

,

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in November experienced a +1% change to the end of the year