let c(t) be the number of customers in a restaurant t hours after 8 am

Answer:
The given graph does not represent a function.
[tex]\text{ Not a function}[/tex]Explanation:
Given the relation on the given graph.
we want to determine if the relation is a function or not.
For it to be a function one input must not give more than one output.
From the graph, input 2 gave more than one output (1 and 5).
Therefore, the given graph does not represent a function.
[tex]\text{ Not a function}[/tex]