Final answer:
The domain and range of the function f(x) = x - 7 + 9 are all real numbers.
Step-by-step explanation:
The domain of a function represents all the possible input values (x-values) for the function. In this case, the function is f(x) = x - 7 + 9. The only restriction on the x-values is that there are no division by zero or square root of negative numbers in the function. Since there are no such restrictions in this function, the domain is all real numbers. The range of a function represents all the possible output values (y-values) for the function. In this case, since the function is f(x) = x - 7 + 9, the values of y depend on the values of x. By substituting different values of x into the function, we can determine the corresponding values of y. The function f(x) = x - 7 + 9 will generate different y-values for different x-values. Therefore, the range is also all real numbers.