the graph below shows the average monthly change in the price of three metals during 2014

The given line chart compares the fluctuation in the cost of copper, nickel and zinc every month over a certain year.

Overall

, it is clearly seen from the chart that the changes in the price experienced a period of erratic behaviours for all factors during 2014.

In addition

, all the

catagories

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categories

faced a downward trend from

January

to June

and

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followed by a statistical pattern;

moreover

, recovered it's upwards. Looking at the details, Nickel's cost hit the highest point in

January

at 6 which was a large amount, during the whole term. It was followed by a significant fall till June in the bottom out at

mines

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mine

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three and

also

after a constant course, level out at one to the end. In the same term, in

January

the amount of Zinc fluctuations rose sharply;

this

was followed by a dramatic decline in

January

at mines one and regained its upward trend to the end of the course at two.

Finally

, unlike others Copper saw a remarkable increase at the start,

although

the same as Nickel and Zinc decreased to June well under zero; It stayed unchanged from July to September at one, and

also

moved down and up to the end of term at just under two.