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Some relations are given as \[\] $R_1$ = {(a, b), (b, c), (a, c), (c, b)} \[\] $R_2$ = {(1, 2), (2, 5), (6, 6), (3, 4)} \[\] $R_3$ = {a, p), (b, q), (p, t), (r, t)} \[\] $R_4$ = {(10, 11), (11, 12), (10, 13)} \[\] $R_5$ = {(15, 20), (20, 25), (25, 30)}\[\] Which of the given relations are not functions?

1 Answer

$R_1\: and \: R_4$
Hence (A) is the correct answer.
answered Jun 26, 2014 by thanvigandhi_1
 

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