Question: Determine whether the relation is a function. Identify the domain and the range. (a) {(2, 10), (3, 15), (4, 20)} (b) {(3, 1), (5, 1),

Determine whether the relation is a function. Identify the domain and the range.
(a) {(2, 10), (3, 15), (4, 20)}
(b) {(3, 1), (5, 1), (7, 1)}
(c) {(-7, 3), (-2, 1), (-2, 4), (0, 7)}

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