The provided line graph demonstrates the changes in the price of three different metals: zinc , copper and nickel. The data is measured in percents and cover a whole year in 2014.
Overall , the prices for almost all metals experienced a significant drop with fluctuations with nickel was in the leading position at the start and took the last place by the end . The opposite was true in zinc which had leading at the end.
The price for nickel shows a drastic decrease in the first half of the year with 6% till -3% which was the lowest point.This was followed by a slight increase by 4% by December. The same was true in the index os copper with 2% falling down to almost -1% between January and June This was followed by growth till almost 2% by the end of the year.
In stark contrast, the price of zinc increased significantly reaching 3%in the first month. However , it experienced a falling tendency till -1% by June then surged till 2% in December.