The problem asks to find the domain of the relation given by the set of ordered pairs $\{(-2, 1), (-1, 2), (1, 2), (2, 3)\}$. The domain of a relation is the set of all first elements (x-coordinates) of the ordered pairs.

1. Problem Description

The problem asks to find the domain of the relation given by the set of ordered pairs $\{(-2, 1), (-1, 2), (1, 2), (2, 3)\}$. The domain of a relation is the set of all first elements (x-coordinates) of the ordered pairs.

2. Solution Steps

To find the domain, we list the first element of each ordered pair:

- The first element of $(-2, 1)$ is $-2$.

- The first element of $(-1, 2)$ is $-1$.

- The first element of $(1, 2)$ is $1$.

- The first element of $(2, 3)$ is $2$.

The domain is the set of these first elements. We write them in ascending order:

$\{-2, -1, 1, 2\}$.

3. Final Answer

$\{-2, -1, 1, 2\}$