Find the domain and the range of the relation.
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A)domain: [-4, ∞); range: (-∞, ∞)
B)domain: (-∞, ∞); range: [-4, ∞)
C)domain: (-∞, ∞); range: (-∞, ∞)
D)domain: (-∞, ∞); range: (-∞, -4]

Question

Find the domain and the range of the relation.
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A)domain: [-4, ∞); range: (-∞, ∞) 
B)domain: (-∞, ∞); range: [-4, ∞) 
C)domain: (-∞, ∞); range: (-∞, ∞) 
D)domain: (-∞, ∞); range: (-∞, -4]

Quizplus · Accepted Answer

Since no restrictions are given, the domain and range are both all real numbers, which is represented by (-∞, ∞). However, the relation is specifically defined as being greater than or equal to -4 (TB8421_00), so the range is restricted to [-4, ∞). Therefore, the correct choice is B.

Find the Domain and the Range of the Relation