Excel 2007 has a few handy functions to find what cell's you have used in a formula. The quickest and simplest method is through the ribbon. On the formulas tab, above the heading Formula Auditing, you'll find Trace Precedents and Trace Dependents.
Precedents affect the value of the currently selected cell.
Dependents are those cells affected by the currently selected cell.
Determining dependents is just as simple. Below, I have select cell A4 and clicked Trace Dependents. A blue arrow appears from A4 to let me know that the formula in B7 is dependent upon this cell.
Tracing cell precedents and dependents can be a great way to view the relationships between values and quickly identify any origiins of errors.









