Step 1: Meaning of a Radar Chart:
A radar chart is a graphical tool in which data series or related data points are plotted.
The data is multivariate, because three or more quantities are plotted.
Each data series in the chart has its own unique colour or pattern.
Step 2: Purpose of a Radar Chart:
A radar chart is drawn to compare the highest and the lowest values.
The points of each series are joined, so the shape shows at a glance where a series is strong and where it is weak.
Final Answer:
A radar chart plots three or more quantities for each data series in a unique colour or pattern. Its purpose is to compare the highest and lowest values.