Question

a) the center - radius form of the equation of the circle is
□. (type an equation.)
b) use the graphing tool to graph the circle.

Explanation:

Step1: Recall circle - equation formula

The center - radius form of a circle with center $(h,k)$ and radius $r$ is $(x - h)^2+(y - k)^2=r^2$.

Answer:

$(x - h)^2+(y - k)^2=r^2$