I think it's an excellent answer.
It is an answer because it does explain what the OP needs to know to be able to answer it for himself.
give a man a fish and you feed him for a day; teach a man to fish and you feed him for a lifetime
My only concern is how you would make the answer "findable" to people with similar questions as the question title(s) do not really reflect the problem the OP faces.
Maybe the title should be editedited to something like "How do I curve fit using excel"?
There are some excellent links on how to do this, for example:
Etc...