Answer: Hi there! Hope this helps!
Domain of any function is represented by the x-values and Range is represented by the y-values.
Graph (1),(Row (1) first graph)
Domain → (-∞, ∞) Or set of all real numbers
Range → (-∞, ∞) Or set of all real numbers
Graph (2) (Row (1) second graph)
Domain → [0, ∞} Or x ≥ 0
Range → [-2, ∞) Or x ≥ -2
Graph (3) [Row (2) first graph]
Domain → (-∞, ∞) Or set of all real numbers
Range → (-∞, ∞) Or set of all real numbers
Graph (4) [Row (2) second graph]
Domain → (-∞, ∞) Or set of all real numbers
Range → [4, ∞) Or x ≥ 4
Explanation : I did this assignment.