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Verified Answer :

  1. Domain: {-1, 0, 1, 2}
    Range: {2, 1, 2, 5}
    Function

    2. D: {1, 3, 5}
    R: {2, 4, 6, 8}
    Not a function . (bc in the domain, the '3' is used more than once)

    3. f (3)= 2 (3) - 4
    f (3)= 6-4
    f (3)= 2

    4. f (-5) = 2 (-5) - 4
    f (-5) = -10 - 4
    f (-5) = -14

    5. f (2) + f (4) = f (6)
    f (6) = 2 (6) - 4
    f (6) = 12-4
    f (6) = 8
    (not sure about this one)

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