When you have finished this page, try the Line Graphs Quiz.
A line graph is most useful in displaying data or information that changes continuously over time. The example below shows the changes in the temperature over a week in January. Notice that the title of the graph is "Average Daily Temperature for January 1-7 in degrees Fahrenheit".
Underneath is a table that shows the date in one column and the corresponding temperature in the second column. The line graph above shows the degrees of temperature going up the vertical axis (up and down numbers on the left of the graph) and the days of the week on the horizontal axis (going sideways from left to right). The points for the temperature for each day are connected by a line - thus the graph is a line graph.