The equation of a cricle is

h being the x coordinate of the given point and k being the y coordinate of the given point (r also being the radius).
Now we have to plug the points into the equation

now just simplify the the equation
Answer:
• Consider points (2, 0) and (0, 6) spotted from the graph.

• substitute:

Answer:
22.5
Step-by-step explanation:
since 2.25 divided by 0.10 is 22.5 so she can message 22.5 friends