The difference of twice a number and 9

10 and 8 and 18,

Step-by-step explanation:

first of all 18 is half of 19, and 10 and 8 are between 9

dhhghghghhrhbb it 5

d

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: