$1-$Use linear Regression to fit a line in the following data:

$T($temperature$)=[0,5,10,15,20,25]$

Viscosity $=[10\mathrm{.}49,6\mathrm{.}730,4\mathrm{.}241,2\mathrm{.}496,1\mathrm{.}519,0\mathrm{.}9934]$ and then:

a$)$ calculate the goodness of fit

b$)$ find the value of $$ when $T=14$

Please be fast