Answer:(a)
Step-by-step explanation:
A function is a relation between two sets that associates the distinctive components of the first set to the second set distinctive elements.
Points are [tex](-1,3), (2,5), (3,8), (4,5)[/tex]
given points is not a function because each point is not associated with a unique point. for example, 2 and 4 is associated with the same number 5