Answer:
The domain is the set of x -coordinates, {0,1,2} , and the range is the set of y -coordinates, {7,8,9,10} . Note that the domain elements 1 and 2 are associated with more than one range elements, so this is not a function.
refer to the above attachment ↑
x+y=1 (if x=4 )
4+y=1
y=1-4
y=-3
