Data analysis for coefficients and or exponent selections

Hello everybody, I have a kind of simple question if someone could help me with. I have several empirical equations from regression analysis for several different data sets of same variables. I was interested in running an analysis by which I could get one final equation. E.g. is there any analysis which would test and give me one value for coefficients and or exponents? Thank you in advance

[Star Strider]

... Possibly ...

[amberly hadden]

Possibly what?