Question

Please Help !!! Im stuck on these problems !

Choose the relation with a domain of {−4, 0, 1}.
R = {(3, 2), (1, 8), (1, 2), (0, −5), (−4, 4), (3, 5)}
R = {(−4, −2), (0, 0), (1, 3), (−4, −2), (1, 3)}
R = {(2, 3), (8, 1), (2, 1), (−5, 0), (4, −4), (5, −2)}
R = {(3, 1), (0, 0), (−2, −4), (3, 1), (−2, −4)}


If f(x) = −3x + 1, find f(−2).
7
−5
−4
6


If C = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12} and D = {numbers divisible by 4 from 1 to 12}, what is C ∩ D?
{4, 8, 12}
{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
{8, 12}
{ }

Answer 1

do you know what domain is?

Answer 2

no clue

Answer 3

@dpaInc

Answer 4

the domain is the set of first elements... so take a look at each relation, and decide which of those ordered pairs have their first elements in the domain listed...