A line graph is a graph that connects
points to show how data changes over time. 
How can you use a
line graph? 
You can use a
line graph to show how data changes over time. 
 Each point represents an item of data.
 The height of the point represents the value of
the data.
 The time is shown by how far to the right the
point is.


1.
It is easy to read.

2.
A
broken scale
can be used when the data
starts at a large number.

3. They show
specific values
of data,
so if you are given one variable
the other can easily be determined.

4. They show
patterns in data
clearly,
meaning that they visibly show how one
variable is affected by the other as it
increases or decreases.

5. They enable
the viewer to make
predictions
about the results of data.


1.
It can only
be used to show data over
time. 
2. You can
change the way the data of a line
graph appears, by not
using consistent
scales on the axis. 

Remember:
A
line
graph has both advantages and disadvantages when
using them.

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