Decide whether the relation is a function, and give the domain and range.
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A) Not a function; domain: $(-\infty, \infty)$; range: $(-\infty, 4]$
B) Not a function; domain: $(-\infty, 4$ ]; range: $(-\infty, \infty)$
C) Function; domain: $(-\infty, 4$ ]; range: $(-\infty, \infty)$
D) Function; domain: $(-\infty, \infty)$; range: $(-\infty, 4]$

Question

Decide whether the relation is a function, and give the domain and range.
-
A) Not a function; domain: $(-\infty, \infty)$; range: $(-\infty, 4]$ 
B) Not a function; domain: $(-\infty, 4$ ]; range: $(-\infty, \infty)$ 
C) Function; domain: $(-\infty, 4$ ]; range: $(-\infty, \infty)$ 
D) Function; domain: $(-\infty, \infty)$; range: $(-\infty, 4]$

Quizplus · Accepted Answer

The Answer of Decide whether the relation is a function, and give the domain and range.
-
A) Not a function; domain: $(-\infty, \infty)$; range: $(-\infty, 4]$ 
B) Not a function; domain: $(-\infty, 4$ ]; range: $(-\infty, \infty)$ 
C) Function; domain: $(-\infty, 4$ ]; range: $(-\infty, \infty)$ 
D) Function; domain: $(-\infty, \infty)$; range: $(-\infty, 4]$

Decide Whether the Relation Is a Function, and Give the Domain