Rick: I went through the same analysis you did. Is Eric looking for an
exact
results. Maybe if Eric plotted the data and then added a trend line he
could
get an approximate result.

A 3rd order polynomial give a good approximation

y = 0.0417x3 - 0.3575x2 + 1.043x + 0.582

You may be right, but my gut tells me there are probably several other
polynomials, of completely different shapes, that could also pass through or
near those points. Perhaps if Eric provides more details (for example, as to
where these numbers come from or what they are supposed to be modeling),
then maybe we can make better guesses for him.

Rick