Final answer:
The domain of the function is 'All real numbers', and the range is also 'All real numbers'.
Step-by-step explanation:
The domain of a function refers to the set of all possible input values, while the range refers to the set of all possible output values. In this case, the question states that the function's domain is 'All real numbers', which means that any real number can be used as an input for the function. The range, on the other hand, can be determined by looking at the graph of the function or by analyzing the equation. Since the function is a horizontal line, it will have a constant output value for any input. Therefore, the range of the function is 'All real numbers' as well.