Question

If f(x) = x + 3 where A = {4, 6, 8,10} B = {7, 9,11,13} and f: A → B

(i) Draw the arrow diagram

(ii) Why type of function is f.

Answer 1

A = {4, 6, 8, 10}

f(x) = x + 3

f(4) = 4 + 3 = 7

f(6) = 6 + 3 = 9

f(8) = 8 + 3 = 11

f(10) = 10 + 3 = 13

(i) arrow diagram

(ii) one – one onto function