Question

Which of the following relations are functions
1) R = {(1,1),(2,2)(3,3),(4,4),(4,5)}
2) R, = {(1,1),(2,3)(3,5),(4,7)}
3) R, = {(1,1),(2,4)(3,9),(5,25)


A) R, and R B) R, and R
C) R, and Rg
D) R, R, and R​

Answer 1

Answer:

{(1,1),(2,2),(3,3),(4,4),(5,5)}