Question

Let x = {1,2,3,4,5,6,7,8,9}. Let r1 bea relation on x given by r1 = {(x, y): x yis divisible by 3}

Answer 1

R1={(3,3),(3,6),(3,9),(6,3),(6,6),(6,9),(9,3),(9,6),(9,9)}