Question

Which of the following is an equation for the circle above?

Answer 1

Answer:

Explanation:

From the graph, first, determine the centre and radius of the circle.

• The centre of the circle, (h,k)=(1,2)

,

• The radius of the circle, r = 4

Substitute these values into the general equation of a circle:

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

This gives the equation of the circle above as: