Step 1 :The domain of a function is the set of all possible input values, often referred to as 'x' values. In this case, the input values are the first elements of each ordered pair.
Step 2 :From the list of ordered pairs \[(-2,9),(6,-7),(-9,-5),(-12,10)\], we extract the first elements from each pair to get the domain.
Step 3 :The domain of the function is \(\boxed{-12,-9,-2,6}\).