To create a line graph, follow these steps:

1. Gather the data: Collect the data that you want to represent on the line graph. Make sure you have both the x-axis (independent variable) and y-axis (dependent variable) data.

2. Determine the scale: Decide on the scale for both the x-axis and y-axis. The scale should be appropriate to accommodate the range of values in your data.

3. Plot the points: On a graph paper or using a graphing software, plot the points by placing a dot at the intersection of the x-axis and y-axis values for each data point.

4. Connect the dots: Once all the points are plotted, use a ruler or a straight line tool in the graphing software to connect the dots. This line represents the trend or relationship between the variables.

5. Label the axes: Write the labels for the x-axis and y-axis, indicating the variables being represented. Include the units of measurement if applicable.

6. Add a title: Give your graph a title that describes the data being represented.

7. Add any necessary annotations: If there are any important points or observations to highlight, you can add annotations or labels to the graph.

8. Review and refine: Double-check your graph for accuracy and clarity. Make any necessary adjustments to improve the presentation.

Remember, line graphs are typically used to show the change in a variable over time or to compare multiple variables. They are especially useful for displaying trends and patterns in data.