Final answer:
The range of the function y = 100 is a single value, which is the constant value 100 itself. Therefore, the answer is a) y = 100.
Step-by-step explanation:
The function described by the equation y = 100 represents a constant function. In a constant function, no matter what value of x you choose, the output y will always be the same. Therefore, the range of this function is simply the single value that y can take. This means the answer to what the range of the function y = 100 would be is a) y = 100. This is because the function outputs the value 100 for all inputs of x, so the set of possible outputs, or the range, consists of the single number 100. Other choices such as All real numbers, No defined range, and y = 0, do not accurately describe the range of this function.