f(-4) = - 4 + 2 = 2 sageata A(-4;2)
f(-3) = - 3 + 2 = - 1 sageata B(-3;-1)
f(-1) = 1 + 2 = 1 sageata C(-1;1
f(0) = 0 + 2 = 2 sageata D(0;2)
f(2) = 2 + 2 = 4 sageata E(2;4)
f(3) = 3 + 2 = 5 sageata F(3;5)
Sageata R ={2,-1,1,2,4,5} acesta este codomeniul