Answer:
3)
D: -2,0,1,3
R: -1,0,1,2,3
Function: no, the input 1 has two outputs: 0 and 2
4)
D: -2,0,3
R: -6,4,5,6
Function: no, the input 3 hs 2 outputs: 4 and =6
Explanation:
Domain is the inputs or all of the x values.
Range in the outputs or all of the y values.
A function has only one output for every input. If it has more than one output for an input, then it is not a function.