|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 “connect-the-dots”.
|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.