Table 1 shows the data of pressure, P, as a function of temperature, T, for the experiment of determining the absolute zero temperature. According to Charles's law for an ideal gas, at constant volume, a linear relationship exists between pressure and temperature.

Temperature, T (C)	0	10	20	30	40	50
Pressure, P (atm)	0.94	0.96	1.00	1.05	1.07	1.09

(a) Develop an equation to fit the pressure, P, as a function of temperature, T.

(b) Determine the pressure at 25 C.

NUMERICAL METHOD ()CHAPTER 3: CURVE FITTING