Question

Explain the meaning of a function in your own words, illustrate with your own specific example.

Answer 1

A function  is a binary relation over two sets that associates every element of the first set, to exactly one element of the second set.

Typical examples are functions from integers to integers, or from the real numbers to real numbers.

f(x)= x² + 1

g(x) =2x+ 5

y=f(x).