What equation in slope intercept form represents the line that passes through the two point? (6.9,5.9), (10.9,-2.1)

y = 2x + b

I dont know what b is but the slope is 2 I think

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: