When should I use a scatter plot?

Use it when you want to examine the relationship between two numeric variables.

What does a trend line show?

It shows the general direction of the data relationship across the plotted points.

Yes. FreeChartKit supports multiple scatter series.

Yes. The tool supports export after the chart is generated.

A scatter plot helps you see whether two variables move together, separate into clusters, or show no obvious relationship at all.

Scatter plots depend on numeric coordinates, so the data should be clean and consistent if you want the pattern to be readable.

A trend line can help summarize whether the relationship appears positive, negative, or close to neutral.

Color-coded point groups are useful when comparing categories such as teams, segments, or experiments within the same chart.