Suppose That the Expected Value of Thermal Conductivity Y Is $$10 ^ { 4 } \cdot 1 / x$$

Suppose that the expected value of thermal conductivity y is a linear function of $$10 ^ { 4 } \cdot 1 / x$$ where x is lamellar thickness. $$\begin{array} { c c c c c c c c c } \hline x & 240 & 410 & 460 & 490 & 520 & 590 & 745 & 8300 \\\hline x & 12.0 & 14.7 & 14.7 & 15.2 & 15.2 & 15.6 & 16.0 & 18.1 \\\hline\end{array}$$
a. Estimate the parameters of the regression function and the regression function itself.
b. Predict the value of thermal conductivity when lamellar thickness is 500 angstroms.