1) You have two points on the circle and you know they represent a diameter. How do you find the diameter from this? The center of the circle is at the center of the diameter. How do you find this?

2) You have the center so what is h and k? You also have a point on the circle. What then, in addition to knowing the center, can you do with that? (Hint: Plug (0, 0) into the circle equation, or note that the line between (0, 0) and (-4, 3) is a radius.)

-Dan