Question

The circle below is centered at the origin and has a radius of 4. What is itsequation?AO A. x2 - y2 = 16B. x2 - y2 = 4O c. x+7=4D. x2 + y2 = 16

Answer 1

The equation of a circle is given by the following formula:

`x^2+y^2=r^2`

Where r is the radius of the circle.

In this case, the radius equals 4, by replacing 4 for r into the above formula, we get:

`\begin{gathered} x^2+y^2=4^2 \\ x^2+y^2=16 \end{gathered}`

Then, the correct answer is option D