Scatter

Scatter charts, also known as scatter plots or scatter graphs, are often used to display continuous data relationships.

The demo below illustrates the relationship between vitamin D and preventing COVID-19 infection. On the x-axis is the mean of vitamin D (nmol/L), whereas on the y-axis is the Covid-19 cases per one million of the population. The data was collected from 20 European countries on April 8th, 2020.

Nice to know

Pros:

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Allows a quick overview of the data relationship.
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Visualize patterns with ease.
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Easy to interpret and understand.
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Outliers are quick to identify.
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Existence of relationship (or non relation) between variables is quickly identified.
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Can handle a large number of data sets.
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Flexible, as functions with almost any continuous scale data.

Cons:

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Data can be easily cluttered with a large number of series.
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Sometimes it is tricky to determine with accuracy distribution, correlations, and patterns.

Remark

To get a precise correlation, adding a trend line to the scatter chart is recommended, such as a regression line.

Information

Learn more about how to create a scatter chart with Highcharts.