Question

Is this a function? Explain. ((-1,-1), (0,1), (-2,3), (0,3),(4,0)}

Answer 1

NO

Explanation:

Each input has just one output but "0" has two output at (0.1),(0,3)

Answer 2

it is not a function because at least one domain is attached to two or more values in the range the domain would be 3 in this case.