Respuesta :
Answer:
all are functions
Step-by-step explanation:
a function is when each x has a y
a relation is when 1 x has more than 1 y which makes it invalid therefore not a function
it’s a function is every single input has their own output. for example, if there were 2 -3’a on the input side, the relation wouldn’t be a function because each input has to have their OWN output, and can’t share outputs.