A line chart displays data values as a set of points connected by a line. You typically use line charts to present large amounts of data that occur over a continuous period of time. A line chart is similar to an area chart, except that it does not fill in the area below the line, and it uses a square to mark each data value. There are three subtypes of line charts.

In an overlay line chart, multiple series appear as overlapping lines. In a stacked line chart, multiple series are stacked vertically. A percent stacked line chart consists of multiple series stacked vertically and the values shown as a percentage of the whole.