Answer the following
questions dealing with graphs of circles.

1. 
Which
of the following equations of a circle has center at
(1,3)
and radius of 5?


Choose:





2. 
What
is the equation of a circle whose diameter is 24 and whose
center is at the origin?


Choose:





3. 
An
ambulance company provides services within an 80 mile
radius of their headquarters. If this service area
is represented graphically, with the headquarters
located at the coordinates (0,0), what is the equation
that represents the service area?



Choose:




4. 
What
are the coordinates of the center of this circle?

Choose:





5. 
What
are the coordinates of the center of this circle?

Choose:




6. 
The
point (1,2) is on the circle whose equation is

Choose:



7. 
The center of a circle represented by the equation
is located in Quadrant _____.

Choose:




8. 
What are the
coordinates of the center of the circle represented by
the equation
?

Choose:




9. 
What is the equation of a circle with
center (3,1) and radius 7?

Choose:




10. 
A circle has the
equation
.
What are the coordinates of its center
and the length of its radius?

Choose:




