Answer:
The correct option is B.
Step-by-step explanation:
The formula for converting from Celsius to Fahrenheit temperatures is
A relation is called a function if there exist a unique output for each input.
The original formula is a function because for each value of C, there exist a unique value of F.
The inverse of the function is
The inverse is also a function because for each value of F, there exist a unique value of C.
Therefore original is a function; inverse is a function. Option B is correct.