D. 12.5
The equation to find the average rate of change is
To find the average rate of change between points (0,20) and (8,120) you need to plug it into the equation so it'll be
this simplifies to
which is 12.5
The equation is
Y=-3/1 +2
Y-Intercept at (0,2)
Answer in the attachment.
Answer:
1000
Step-by-step explanation: