Answer:
The domain of the function is:
Option: C
C. x is all real numbers.
Explanation:
We are given a graph as a straight horizontal line.
Also, the line extends to infinity in both the direction.
This means that the domain of the function is all the real numbers.
Since, the function takes a constant value for all the real numbers.
Hence, the range of the function is the fixed constant i.e. 1.5
Hence, the function is a constant function as we know that the constant function is defined all over the real line.
Hence, the answer is:
C. x is all real numbers.