Hello from MrBillDoesMath!
Answer:
Domain = { 5. 10. 15. 20}
Range = -3,-1,1,3} .
Discussion:
The domain is the set of all "x" values, that is { 5. 10. 15. 20} and the range is (-3,-1,1,3} . The arrows in the diagram show the mapping between the domain and the range. For examples, 5 -> 1 ( "x value 5 is mapped to y value 1"), 10 ->3, 15 ->-3, and 20 -> -2
Thank you,
MrB