#### To determine

**To find:** Domain of f-1

#### Answer

the domain is C≥ -273.15.

#### Explanation

**Calculation:** Let C=fF=59F-32. To find f-1, substitute y=fF, and solve this equation to find the value of F.

So, y=59(F-32) ⇒ F=9y5+32. Thus, F=f-1C=9C5+32, which expresses Fahrenheit temperature as a function of Celsius temperature.

**Domain of f-1:** As F≥ -459.67 ⇒ F-32≥ -491.67⇒ C=F-3259≥ -273.15, therefore C≥ -273.15.

**Conclusion:** Thus the domain is C≥ -273.15.