PLEASE HELP LOOK AT THE ATTACHED GRAPH

4th option is correct xy=-10

if this was to u plzz mark me the brainliest

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:

first one because it can't have a fraction in it

step-by-step explanation:

i am not sure :

step-by-step explanation: