Answer:
relation
Explanation:
To be a function each element from set x has only one unique element in y.
In our case x = 0 has two outcomes y = 1 and y = 3, so is a relation.
f(x) = y
f(-2) = 5
f(0) = 1 and f(0) = 3
f(5) = 8
f(7) = 5
Some memory aids:
Think about if we count how many likes we got on a social media post at the end of the day, then we can not have different numbers for same post yet we can have the same number of likes on different posts to be a function.
f(post 0) = 1 like and f(post 0) = 3 likes ❌ not a function because same post has different numbers of likes at the end of the day -not possible
f(post -2) = 5 likes and f(post 7) = 5 likes ✅ could be a function because different posts can have the same number of likes at the end of the day