Question

what is the domain of this relation?
(-8, -10)
(-9, -3)
(-7, -3)
(-9, 5)
{-9, -8, -7} {-10, -8, -3, 5}
{-9, -8, -7, -3} {-10, -3, 5}

Explanation:

Step1: Identify domain definition

The domain of a relation is the set of all first values from each ordered pair, with no duplicates.

Step2: Extract first values

From pairs $(-8, -10), (-9, -3), (-7, -3), (-9, 5)$, first values are $-8, -9, -7, -9$.

Step3: Remove duplicates, sort values

Unique sorted values: $-9, -8, -7$.

Answer:

$\{-9, -8, -7\}$