Question

Which equation of a circle is represented by the graph?

Answer 1

Answer:

$x^2+y^2=25$

Step-by-step explanation:

The given circle is centered at the origin;

The radius of the circle is

$r=|5-0|=5$ units.

You could also count the boxes from the center to any of the given points to get the radius.

The equation of a circle centered at the origin is given by;

$x^2+y^2=r^2$

We substitute the radius to obtain;

$x^2+y^2=5^2$

The required equation is

$x^2+y^2=25$