Question 1126222
Too many separate questions in one posting.


(1) F and C temperatures


Identify two points and create the formula.
Points (F,C) are (32,0) and (212,100).


{{{C-0=((100-0)/(212-32))(F-32)}}} in point-slope form

{{{C=(10/18)(F-32)}}}

{{{C=(5/9)(F-32)}}}

{{{C=(5/9)F-160/9}}} slope-intercept form, which you might approximate as {{{C=(5/9)F-17.8}}}.
That is formula for Celsius as function of Fahrenheit.


If you want F as a function of C, then just solve the equation for F.


(2) and (3)
You do those on your own.