1. Let's clarify the terms: The **domain** of a function is the set of all possible input values, usually represented by $x$. 2. The **image set** (or range) is the set of all possible output values, usually represented by $y$. 3. So yes, the domain corresponds to $x$ values, and the image set corresponds to $y$ values. 4. For example, if you have a function $y = f(x)$, the domain is all $x$ values you can plug in, and the image set is all $y$ values you get out. 5. This is a fundamental concept in understanding functions in algebra and calculus.