Little help in the least square method and Antoine Equations Plz!

Hi I need your help with these questions : Q1: Use the least square methods to find the most suitable equation for fitting the following data:

I(min): 1.02 ,0.84 ,0.69 ,0.56 ,0.38 ,0.17 CA(Ibmole/ft)): 1.5 ,2.0 ,2.5 ,3.0 ,4.0, 6.0

Test the following equation to decide which one will fit with small error: The error = Σ(CA - CAexp )^2 1. CA = CAo exp(-kl) 2. CA= CAo I^K 3. 1/CA= CAo+ I^K Note: CA0 and K are the equation constants (slope and intercept depends on equation in the liner mode)

,..,.,..,...,...,..,....,....,......,......,.....,....,.....,.....,.....,....,.....,.....,

Q2:

a) Use Antoine Equations to fit the following data: Antoine Equation : In (p*)=A- B/C+T T(C): 30 50 100 150 200 250 p(atm): 0.042 0.122 1.00 4.70 15.36 39.22 b) caculate the pressure at temperature of 400 K ?

that's it i hope you help me and thank you

[Geoff Hayes]

What have you tried so far?