It’s the first one I think!
Answer:
yes, it's a function
Step-by-step explanation:
A function relates one input to one output, and it's "only" one output.
The equation of circle is:
(x-a)^2+(y-b)^2=r^2 where C(a, b) is the center.
In order to find r you have to find the distance between C(-2, 1) and let's say A(-4, 1)
The formula for distance is:

r = 2
The equation of circle is
(x+2)^2+(y-1)^2=4
I hope that this is the answer that you were looking for and it has helped you.
Answer:
ac
Step-by-step explanation:
xcsddddssss
Answer:
B and C
Step-by-step explanation: