Question

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

Answer 1

the domain is the set of first numbers in each pair ( no duplicates)

Answer 2

2. no
because the output from 0.3 is 0.6 and 0.7
- a one- to-many relation which is not a function

Answer 3

can you help me with this question by explaning the first one

Answer 4

1. a
2. b