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

The given line chart presents the percentages of average change in price for three types of metals in 2014. As can be seen from the line graph, nickel experienced a drastic downward trend in the first five

months

, and

then

grew slowly for the following six

months

.

In contrast

, the number

for

Change preposition

of

show examples

zinc went down for almost eight

months

during the middle period

,

Remove the comma

apply

show examples

and only showed

increase

Add an article

an increase

show examples

for three

months

.

On the other hand

, the price for

cooper

Capitalize word

Cooper

show examples

was comparatively stable, it did not experience significant fluctuations. It is evident that the price

for

Change preposition

of

show examples

nickel was the most expensive of all in January. It went from its peak at 6% in January to its lowest point at -3% in June, and it climbed gradually from -1% in July to 1% in December.

On the contrary

, the number of

cooper

Change to a plural noun

coopers

show examples

was quite constant. It dropped from 2% in January to a low of -0.5% in March, rising to 1% in a month, and remained steady for the next four

months

, and grew back to 2% in December.