A line chart displays a series as a set of points connected by a single line. Line charts are used to representing large amounts of data that occur over a continuous period of time. They can also be used to display a series of data points, typically to show trends over a period of time. One or more series of data can be used and the appearance for each series can be tailored to emphasize the data using unique colors, line thickness, pen style, and point marks.
The following image displays a line chart that contains three series.
Straight Line Chart. A line chart that uses straight lines to connect the data points.
Smooth Line Chart. A line chart that uses curved lines instead of regular ones.
Stepped Line Chart. A line chart that uses horizontal and vertical lines to connect the data points, creating a step-like strcuture.
To improve the visual impact of the default line chart, consider increasing the thickness of the series line. This will create a bolder line chart.
A line chart requires at least two points to draw a line.
A series that is drawn as a line will not take up much space within a chart area. For this reason, line charts are frequently combined with other chart types such as column charts.