Here is the answer for the 1st one. I have a picture of the second one but I’m not sure if I can post the picture of it
Answer:
y = -1x + 7
Step-by-step explanation:
y2 - y1 / x2 - x1
9 - 0 / -2 - 7
9 / -9
= -1
y = -1x + b
0 = -1(7) + b
0 = -7 + b
7 = b
Answer:
The answert is "$0.007 / bottle".
Step-by-step explanation:
Please find the complete question in the attachment file.

The average income:

The change rate on the average revenue:

when 81 bottles were produced
, then the rate of change in average revenue
The average income is decreasing at rate = $0.007 / bottle
According to these numbers, in 2010 the federal debt per capita was $43,888.75. Hope this helps!