Line Graphs

Line Graphs

1. Used to show how data changes over a period of time

2. Used to show trends

3. Data points on a line graph can be joined by lines

   • When the lines join points that show continuous data. They are drawn as solid lines because the lines can be used to estimate intermediate values
   • When the lines join points that show discrete data. They are drawn as dotted lines, because the lines cannot be used to estimate intermediate values