That's not how it works. The definition of linear used in this context requires f(a+b) = f(a) + f(b) which is not the case with the C to K translation which is

That's not how it works. The definition of linear used in this context requires f(a+b) = f(a) + f(b) which is not the case with the C to K translation which is f(x) = x + 273.15 Only functions in the form y=mx+0 meet the criteria.