You would then plot 85 centimeters for year 2 and 95 centimeters for year 3. If you had more heights for more years, you would plot years 4, 5 and so forth. When you had enough points on your graph, you could draw a line through each of the plotted points, making your graph a "line graph". For example, the line graph at the upper right shows the unemployment rate (as a percent) on the vertical axis and the year (from 1950 to 2005) on the horizontal axis.