Answer:
Option b. 12
Step-by-step explanation:
we know that
To find the average rate of change, we divide the change in the output value by the change in the input value
The average rate of change is equal to
In this problem we have
Substitute

Answer:
Im pretty sure it's A because Z and AZ are collinear
Answer:
No.
Here's the break why it is not proportional...

The proportion breaks near the end because the multipliers no longer match.