What exactly are these situations can you tell me and maybe I could help you out.
Answer:
I believe it's A and B
Step-by-step explanation:
All you need to do with this problem is convert 
into a square root. Then you'll get the answer 
.
Answer:
r = -1
Step-by-step explanation:
To get r isolated, you have to divide each side by -7
7 divided by -7 is -1, therefore r = -1
If the slope is 0, then x does not change at all.
take the given y coordinate, and make that the equation.
so y=-9, since the line will never change.
