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

,

Nickel

and Zinc in all months

in

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2014.

According to

the provided data, the costs of

Copper

and

Nickel

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

while

cost

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the cost

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of Zinc experienced a sharp negative change

at the end

of the studied period. In January 2014,

Copper

and

Nickel

saw a 2% and a 1%

changes

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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

and

Nickel

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

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

however

, it started to decrease up to July and reached

to

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

although

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