Step-by-step explanation:
Interval notation

Inequality Notation

Answer:
(3, -6) and (7, -6)
Step-by-step explanation:
Plugging it in the slope formula we get -6+6 = 0, meaning the division will be 0. This the slope is 0
Step-by-step explanation:
Hope it helps you in your learning process.
Ok I will show my work in the comments
A is independent while b is dependent.
This is because b is equal to a decreased by 2. Anytime a changes, then b does as well. B can only change in accordance with a.