
Making line graphs
Making line graphs to show change over a period of time is a straightforward process.
Instead of drawing bars, a dot is used at the correct height
Take a look at the following line graph:
The title is " Scores on a basic math test"
The scale is at the left of the graph. The distance between each square is 10, so the scale is 10
It shows scores for a student over a period of time or after taking 10 basic math test.
A wealth of information can be deducted from the graph
The lowest score is 40 and the highest score is 100
The greatest increase or improvement happened between test #2 and test #3. As you can see the student went from a score of 40 to a score of 70.
The lowest decrease or happened between test #6 and test #7. The student went from a score of 90 to a score of 60
Looking at the graphs, it looks like although the score dropped a couple of times, overtime the student made consistent progress.
Example:
Use the following data to make a line graph
We get:
The graph has an upward trend and shows that overtime, gas prices kept increasing.
Looking at the graph, you can see that the line is steeper between 2007 and 2008.
This means that the highest increase was experienced between 2007 and 2008. Gas prices went up by a dollar

