Beginnertrends
Line Chart
The standard for showing how a single value changes over time.
Quick Facts
Complexity
beginner
Category
trends
Line Chart · Example Data
When to use a Line Chart
- Showing change over time with continuous data
- Revealing trends, growth rates, and momentum
- Comparing a metric against a baseline or previous period
- Data with 20+ time points where bars become cluttered
About the Line Chart
A line chart connects data points with a continuous line, emphasizing the trend and rate of change over time. It is the default choice for time-series data and is immediately understandable by any audience.
Lines imply continuity between data points, so only use them for data that is truly continuous (or at least ordered). For categorical data without inherent order, use a bar chart instead.
Keep the line weight between 2–3px, use a high-contrast color, and consider shading the area below the line when showing cumulative values.