What term is used for a preset command in a spreadsheet that automatically performs a specified process on data?

The correct term for a preset command in a spreadsheet that automatically performs a specified process on data is "Function." Functions are built-in commands in spreadsheet applications that allow users to quickly carry out calculations or data processing without having to manually input the entire command each time. For instance, functions like SUM, AVERAGE, and COUNT take specified ranges of data and apply a particular operation on them, returning results instantly.

In spreadsheets, functions simplify complex tasks by being predefined and easily accessible, facilitating the analysis of large datasets efficiently. While "equation" and "formula" can refer to mathematical expressions used in spreadsheets, they typically require user-input and do not denote preset operations. The term "procedure" is not commonly used in the context of spreadsheet commands and is more relevant in programming contexts, where it refers to a set of instructions executed when called. Thus, "Function" is the most accurate term in this context.