Copy cell contents from worksheet function

Hello,

I have a question re: Microsoft Excel 2007 :-

I have a worksheet of raw data named 'raw'.

I also have another worksheet named 'graphs'.

Is there a function available so that when a numerical value is inserted in to e.g. Cell A1 of the 'raw' worksheet, the same value will also be inserted in to e.g. Cell A2 of the 'graphs' worksheet?

The 'raw' worksheet is very large so a function would make my life much easier as opposed to just copying the cell contents from one worksheet to another!

Any help would be much appreciated!