Plotting and interpreting graphs
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3. How to plot a line graph (1)

A line chart or line graph is a type of chart and graph, created by connecting a series of data points together with a line.

To draw a line graph:

- first draw a horizontal and a vertical axis.

- Each axis should be clearly labeled with the quantity that is being plotted.. Include the name of the variable and the unit of measurement.

- In line graphs, the y-axis runs vertically (up and down). The dependent variable should be plotted on the vertical axis. The y-axis usually starts counting at 0 and can be divided into as many equal parts as you want to. You must chose a proper scale for the y-axis and label it with the proper units.

- The independent variable should be plotted on the horizontal axis, x-axis. The x-axis runs horizontally (flat). Typically, the x-axis has numbers representing different time periods or other magnitudes. The x-axis usually starts counting at 0 and can be divided into as many equal parts as you want to. You must also chose a proper scale for the x-axis and label it with the proper units.

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