The 
graph
 below illustrates to monthly waves of Use synonyms
copper
, Use synonyms
nickel
, and Use synonyms
zinc
's total prices Use synonyms
Linking Words
while
 2014.
Change preposition
in
Overall
, the Linking Words
graph
 has 12 Use synonyms
month
, and begin of the Change to a plural noun
months
yearthe
 rates of materials have Correct your spelling
year
a huge gaps
Correct the article-noun agreement
huge gaps
a huge gap
 among
. Change preposition
apply
Nickel
 is higger than others. Use synonyms
In 
Linking Words
contrast
 Add a comma
contrast,
zinc
 is lowest, if Use synonyms
compare
 to Wrong verb form
compared
nickel
 and Use synonyms
copper
. RatherUse synonyms
 than
, Correct word choice
apply
copper
 is Use synonyms
middle
 of them. In the Use synonyms
middle
 of the Use synonyms
graph
, Use synonyms
nickel
 and Use synonyms
copper
's rates are so close but Use synonyms
zinc
 Use synonyms
have
 a big space between others. Correct subject-verb agreement
has
Finally
, the three elements are almost Linking Words
same
 numbers.
Correct article usage
the same
Firstly
, Linking Words
Use synonyms
nickel
 price's Correct article usage
the nickel
rise's
 percentage is Change noun form
rise
highest
 level if Change the article
the highest
examine
 Wrong verb form
examined
to
 others, it is %6. Change preposition
by
On the other 
Linking Words
hand
 Add a comma
hand,
copper
 and Use synonyms
zinc
' amounts are so close and they have a %1 Use synonyms
differences
. From Change to a singular noun
difference
begin
 to Change the verb form
beginning
Use synonyms
middle
 of the Correct article usage
the middle
graph
 has Use synonyms
Correct article usage
a steadly
steadly
 decrease Correct your spelling
steadily
steady
about
 all of them. We can notice Change preposition
in
that 
Linking Words
is 
Unnecessary verb
apply
nickel
's percentage is under Use synonyms
the 
zero, Correct article usage
apply
while
, Linking Words
zinc
 has not Use synonyms
shift
 on the Change the verb form
shifted
graph
, Use synonyms
also
 Linking Words
copper
 has a growth Use synonyms
nearly
 half Change preposition
of nearly
percentage
.
Correct article usage
a percentage
Secondly
, betweenLinking Words
  july
 toChange the capitalization
 July
  september
, there Change the capitalization
 September
is
 no changes. The lines are Change the verb form
are
stabile
, Correct your spelling
stable
although
 Linking Words
nickel
 is under Use synonyms
the 
both Correct article usage
apply
them
 there Change preposition
of them
is
 %-1 Change the verb form
are
changes
, Fix the agreement mistake
change
Use synonyms
zinc
 is Correct word choice
and zinc
on
 the Change preposition
in
middle
 position between %0 - %-1.  Use synonyms
copper
 is on the top. In the end, all of them are so close they are around %1 - %2.Use synonyms