Answer:
3.A.) It is a function
Domain = {-3,-2,0,1}
Range = {0,-4,0,-4}
3.B.) It is not a function
Domain = {0,1,1,4,4}
Range = {0,1,-1,2,-2}
Explanation:
Coordinates to 3.A. are (-3,0), (-2,-4), (0,0), (1,-4)
The Domain is the set of input values which are the x values.
The Range is the set of output values which are the y values.
Coordinates to 3.B. are (0,0), ( 1,1), (1,-1), (4,2), (4,-2)
3.B. Is not a function because it has more than one of the same inputs (x values).
A Function cannot have more than one of the same input (x values).
Hope this helps.