[size=100][size=150]You can use the two GeoGebra Apps to help answer any of the following questions.[/size][/size]
Drag the h slider from side to side. How does this change the circle?
It moves the circle from left to right; it changes the horizontal position of the circle.
Drag the k slider from side to side. How does this change the circle?
It moves the circle from top to bottom; it changes the vertical position of the circle.
Drag the r slider from side to side. How does this change the circle?
It makes the circle larger or smaller; it changes the radius of the circle.