Hello. I am using Excel 2008 for Mac. I want to use an exponential curve to fit the data. Could anybody please tell me how to do that? I don't seem to find the function under the regression type option in Graph. From previous postings, I read that I am supposed to click Tools->Add-ins. Then, check the checkbox for Analysis ToolPak. However, in my case, there is nothing to choose from under Add-ins. Thanks.