9. The conversion rule for Fahrenheit to Réaumur is R(t)=4/9*(F(t)-32)

Explain where the 32 and the 4/9 come from in this formula. Then describe the transformations from the graph of F(t) to the graph of R(t). (4 points: 2 points for the explanation (1 point for each number) and 2 points for the description (1 point for each transformation))