Which graph best represents a function with a domain of all real numbers greater than or
equal to 5?

Answer:
(c)
Step-by-step explanation:
You want the graph that has a domain of x ≥ 5.
The domain of a function is the set of x-values for which the function is defined. A domain of x ≥ 5 means the function is defined for x-values at least 5. The graph of the function will extend from x=5 indefinitely to the right.
Graph C is like that.