Test 1: The graph below shows the average monthly change in the prices of three metals during 2014. Summarize the information by selecting and reporting the main features and make comparisons where relevant.

The line chart illustrates the percentage of monthly changes in

prices

Correct article usage

the prices

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of copper, nickel, and zinc in 2014.

Overall

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, copper and zinc showed a steady trend despite some short-term fluctuation. Meanwhile, nickel experienced a significant decrease over time. In January, the percentage of prices of copper

began

Check wording

prices began

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at 2%, and

thereafter

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it declined gradually to 0.5%.

This

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figure remained stable until April, before falling to -0.5% in the next month.

However

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, the number recovered to 1.5% by the end of the year. As for zinc, the proportion accounted for 1% in January, which was followed by a substantial increase to 3%.

Although

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the price fell steadily and hit a low of -1%, it soared to 2% in December.

In contrast

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, the percentage of Nickel prices stood at 6% at the beginning.

This

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number fell dramatically to 1% in March and levelled off in the following month. Before dropping to -3%, the price decreased slightly to around -0.5% in March. The share increased to -1% and remained unchanged for the next two months. From October onwards, the share climbed up to 1% in the remaining months.