Algebra-2

Question Analysis
This question tests the student's ability to identify the domain of a relation given in a graph. The domain is the set of all input values (x-values) in the relation.

Key Concept Explanation
The domain of a relation is the set of all input values (x-coordinates) in the ordered pairs. In a graph, these are the x-coordinates of the plotted points.

Step-by-step Solution
1. Identify the input values (x-values) from the graph: 1, 3, 5, 7.