How To Construct a Line Graph On Paper 
Step  What To Do  How To Do It 
1  Identify the variables   Independent Variable –
(controlled by the experimenter) Goes on the X axis (horizontal)
 Should be on the left side of a data table
 Dependent Variable –
(changes with the independent variable) Goes on the Y axis (vertical)
 Should be on the right side of a data table

2  Determine the variable range.   Subtract the lowest data value from the highest data value.
 Do each variable separately.

3  Determine the scale of the graph.   Determine a scale.
(the numerical value for each square), that best fits the range of each variable.  Spread the graph to use MOST of the available space.

4  Number and label each axis.   This tells what data the lines on your graph represent.

5  Plot the data points.   Plot each data value on the graph with a dot.
 You can put the data number by the dot, if it does not clutter your graph.

6  Draw the graph.   Draw a curve or a line that best fits the data points.
 Most graphs of experimental data are not drawn as “connectthedots”.

7  Title the graph.   Your title should clearly tell what the graph is about.
 If your graph has more than one set of data, provide a “key” to identify the different lines.
