Types of business graph All of the business graphs in Genero Report Writer map Numeric values, grouping the data for the desired result. Map chartsThe map chart allows you to create a graph that has one set for values to be mapped, grouped together by a specific key. Category chartsThe category chart allows you to create a graph that has two keys for each set of values. XY chartsThe XY chart allows you to create a graph that maps a series that has two values, as an XY-plot.