Question

How do you write the general form of a circle given center: (7,-3) Tangent to the x-axis?

Answer 1

Radius is 3 units. So, the equation is `( x - 7 )^2 + ( y + 3 )^2 = 9`.

Explanation:

Radius to any point of the circle is altitude to the tangent at the point. y-ordinate of the center is radius, in magnitude..