1. The problem asks us to determine if the given mapping from Set A to Set B represents a function. 2. A function is a relation where each element in the domain (Set A) maps to exactly one element in the codomain (Set B). 3. Let's examine the mappings: -1 \to 3 4 \to -3 -2 \to 8 -2 \to 5 4. Notice that the element -2 in Set A maps to two different elements in Set B: 8 and 5. 5. This violates the definition of a function because one input (-2) has two outputs (8 and 5). 6. Therefore, the mapping above is \textbf{not} a function since in the domain there is at least one element (-2) that maps to more than one element in the codomain. Final answer: The mapping is not a function.