Final answer:
The function y = x - 4 is related to the parent function y = x through translation. Each output of y = x - 4 is four units less than the corresponding output for y = x.
Step-by-step explanation:
The function y = x - 4 is a linear function that is related to the parent function y = x through translation. To graph the function y = x - 4, we can shift the graph of y = x down by 4 units. Each output of y = x - 4 is four units less than the corresponding output for y = x. Therefore, the correct answer is option C - Each output of y = x - 4 is four less than the corresponding output for y = x.