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