Excel can solve for unknown variables, either for a single cell with Goal Seek or multiple cells with Solver.

How to Use VBA to Access the Equation of a Trend Line on Microsoft Excel. Trend lines are a type of regression analysis, which is a way to study the relationships between variables.

How to Use Tab Names as Variables in Excel. When you type data into an Excel workbook, the sheet's name appears in a tab at the bottom of the application window.