Answer:
The radius would be 4.
Explanation:
The radius is always half of the diameter, which would be all the way around the circle. The radius would be halfway around the circle.
So looking at the graph, we can see that the circle surrounds the origin (0) 4 spots to the left and 4 spots to the right. This represents the diameter which is 8 and this can be found by adding the two directions (4 + 4) which gets you 8 as a sum. Now knowing this, we simply divide 8 by 2 and we get the radius which is 4.
Therefore, the answer is 4.