Line charts are a series of data points connected by straight lines, on two axes. Dimensions, such as time, display on the horizontal x-axis, and the dependent data displays on the vertical y-axis. One data set is always dependent on the other data set.

Line charts are especially useful when used as part of a combination chart, as they don't obstruct the view of other data on the chart.

To learn how to add a line chart to a board or worksheet, see Add cards to a board and Add cards to a worksheet.

Line charts display one or more dependent variables against one independent variable, such as time. This enables you to easily see spikes and troughs in a continuous data set.

Line charts are particularly useful for emphasizing trends, as they clearly show the rate of change over a fixed period of time or other dimension. When included in a combination chart, line charts can show the effect that a trend has on other values.

Use a line chart to answer:

• What are the fluctuations in X?
• How does A differ from Y?
• Is X related to A?
• How is X affecting Y?
• Have sales increased over the last financial year?

A line chart may not be the best option when:

• conveying proportions or quantitative data.
• there are a large number of categories, as they can become hard to read.
• your X-axis dimension doesn't have data over a long time period, as this could give a false impression of ongoing trends.

Use a different type of chart if:

To learn about other types of chart, see Chart types in detail on the Charts page.