A = { -2,-1,0,3,4}
B = { -3, -2, -1, 0, 1, 2, 3 }
y = 2x - 1
X Y
-1 y = 2(-1) - 1 ==> - 2 -1 = - 3 V
-2 y = 2(-2) - 1 ==> - 4 -1 = - 5 F
0 y = 2(0) - 1 ==> 0 -1 = - 1 V
3 y = 2(3) - 1 ==> 6 -1 = 5 V
4 y = 2(4) - 1 ==> 8 -1 = 7 V
R = { (-1,3),(0, -1),(3,5),(4,7) }