1. The problem statement, all variables and given/known data In the physics lab the following values of a resistor have been recorded as a function of the temperature: Temperature T/°C 20 30 40 50 60 Resistance R/ 213 143 98 69 47 It is said that the temperature dependence of R can be described by the following equation: R(1/T)=a*exp(b/T) , with T as absolute temperature in Kelvin. Plot the natural logarithm of R as a function of 1/T and find from that graph the parameters a, and b. Use the graph paper at the last page! Do you agree that the above equation gives a good description of the data? Which value of R do you expect for a temperature of 100°C? 2. Relevant equations R(1/T)=a*exp(b/T) 3. The attempt at a solution So I drew the graph on excel http://imgur.com/RPowO0o (in Kelving of course because that's what he asked for) What I don't know is how will I find a and b if there are two unknowns in one formula. I have though of b and a to be the mean of each the Temp and the Resistance in the graph as the teacher stated I should be able to solve them from the graph but I have no idea.