How can the x-coordinate of point A on a circle be calculated?

To calculate the x-coordinate of point A on a circle, you start with the center of the circle, which is typically represented by its coordinates. The ball.getX() method retrieves the x-coordinate of the center of the circle (represented as 'ball'), and the radius represents how far out from the center the edge of the circle extends.

For point A, if you're looking to find a point on the leftmost edge of the circle, you subtract the radius from the x-coordinate of the center. Thus, the calculation is:

• x-coordinate of point A = x-coordinate of the center (ball.getX()) - radius (ball.getRadius())

This effectively gives you the farthest left point on the circle. In contrast, calculating the x-coordinate by adding the radius would yield the farthest right point. The other options either incorrectly apply relationships between y-coordinates and radius or manipulate the values inappropriately. Therefore, the correct approach aligns with the principle of determining the leftmost point on a circle.