Select all relations that represent functions.
(8,7), (7,8), (6,5), (5,6)
(-2,7), (-3,9), (-5,9), (-8,11)
(6,-6), (-3,12), (6,-1), (-8,13)

x y
-3 0
-5 8
-7 8
-9 0

x y
0 0.5
2 1
1 2.5
0 2

Only the second one represent a function because the x does not repeat.

For the first and last functions the x is repeating; therefore they are not functions.

answer: the correct one is a

step-by-step explanation:

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation: