Which of the relations given by the following sets of ordered pairs is a function? {(1,2), ( – 4,8), ( – 3,5), (1, - 2), (7, 12)} {(5, 4), (4,3), (3, 2), (4, 5), (2, 1)}
{(6, 1), ( – 3, 1), (3,5), (2, 4), (- 1, 2)}
{(5, 4), (5, 6), (5,8), (5, 10), (5, 12)}

50 min

step-by-step explanation:

they will be decreasing both their times in half

60 / 2 = 30

40/2 = 20

30 + 20 = 50

b

step-by-step explanation:

b

i think the answer is b.

step-by-step explanation:

not 100% sure though.

14.3

step-by-step explanation:

add all the numbers together.

9 + 12 + 15 + 16 + 17 + 17 = 86

now, divide 86 by how many numbers we have: 6.

86 / 6 = 14.3