Using matlab

The thermal conductivity of iron is found to vary with temperature as follows. Temperature [K] : 70 100 200 300 400 500 600 Conductivity [W/(mK)]:215 134 93 81 70 61 55 a) Plot the data and suggest a relation that you think will fit to it. b) Perform least squares regression and calculate the constants of the suggested regression. Plot the regression curve and the data points. Comment on the performance of the fit