Question

Write the equation of a circle that has a center at (4, - 5) and radius of 9.

Answer 1

( x - 4 )^2 + ( y + 5 )^2 = 9^2

Explanation:

equation of a circle: ( x - h )^2 + ( y - k )^2 = r^2

( h, k ) is the center and r is the radius.