Question

A circle has a center at (4, -7) and a radius of 4 units. What is the equation of this circle?

Answer 1

Answer:

$(x-4)^2+(y+7)^2=16$

Step-by-step explanation:

A circle with radius r and centre (a, b) has an equation:

$(x-a)^2+(y-b)^2=r^2$