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1. Which of the following is the domain of the function {(3, 6), (5, 7), (7, 7), (8, 9)}? {3, 5, 7, 8} {6, 7, 9} {(6, 3), (7, 5), (7, 7), (9, 8)} {1, 3, 5, 7, 9} 2. Is the following relation a function? {(0.3, 0.6), (0.4, 0.8), (0.3, 0.7), (0.5, 0.5)} yes no cannot be determined

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the domain is the set of first numbers in each pair ( no duplicates)
2. no because the output from 0.3 is 0.6 and 0.7 - a one- to-many relation which is not a function
can you help me with this question by explaning the first one

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Other answers:

1. a 2. b

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