Question

need help with this question, its a bit difficult. Would appreciate the needed assistance.

Answer 1

Stating the domain in set notation, we have

$x=\mleft\lbrace-5,-1,-1,2\mright\rbrace$

Stating the range in set notation, we have

$y=\mleft\lbrace-2,3,6,9\mright\rbrace$

It is a function because for every value of x, there is a corresponding unique value of y.