Q19 of 22 Page 2

Which of the following relations are functions? If it is a function,
determine its domain and range:
(i) {(2, 1), (5, 1), (8, 1), (11, 1), (14, 1), (17, 1)}

(ii) {(2, 1), (4, 2), (6, 3), (8, 4), (10, 5), (12, 6), (14, 7)}

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

(i) Yes, Domain = {2, 5, 8, 11, 14, 17}, Range = {1}

(ii) Yes, Domain = {2, 4, 6, 8, 10, 12, 14}, Range = {1, 2, 3, 4, 5, 6, 7}

(iii) No, as two ordered pairs in the relation have the same first element.

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