Relations And Functions

Let N be the set of natural numbers. Define a real valued function
f : N‡ N by f (x) = 2x + 1. Using this definition, complete the table given below.
x 1 2 3 4 5 6 7
y f (1) = … f (2) = … f (3) = … f (4) = … f (5) = … f (6) = … f (7) = …