Numerous statistical and graphical problems have been reported for different versions of Microsoft Excel, including the newest version (Excel 2007). We report newly discovered problemswith Excel 2007when generating polynomial trend line equations, having a userspecified (forced) intercept, from graphed data. We also remind users of Excel’s Trendline function of problems with Excel 2003 that hav...

We begin by considering the expectations of the creators of VisiCalc, the first spreadsheet. The emphasis is on the nature of the spreadsheet grid. The grid is taken as a presentational method for showing a solution to a Sudoku puzzle. We consider methods or approaches for the solution. We look at the relationship between this model and academic papers on the methods for describing and categori...