K(y) = √(9-y^2)

Definition

This function represents another semi-circle with radius 3 centered at the origin. It gives the y-coordinate of a point on the lower half of the circle based on its x-coordinate.

Related terms

Semi-circle: Half of a circle formed by cutting it along its diameter.

Lower half: The part of something (like an object or shape) that lies below or towards negative values.

X-coordinate: The horizontal value (left/right position) of a point in relation to an axis.