To convert Appleworks Spreadsheet data to work with Business Graphics II (from Business and Professional Software), first use AppleWorks to print the Spreadsheet data to a ProDOS Data Interchange Format (DIF) file.
From AppleWorks you can then convert this ProDOS DIF file to a DOS 3.3 DIF file. Business Graphics II can read this DOS 3.3 DIF file and plot the file's data.