Question

Write the equation of the circle with the given center and radius. Then graph the circle. center: (4, 0) radius: 4

Answer 1

The standard form for the equation of a circle is :

(x−h)^2+(y−k)^2=r2
where handk are the x and y coordinates of the center of the circle and r is the radius.
Subtituting h=4, k=0 and r=4 gives :

(x-4)^2+(y)^2=16