The concept of a relationship between two quantities where the rate of change of one quantity is constant relative to the other.

अनुपातिकता

English Usage: The proportionality factor in the equation determines how one variable changes with respect to another.

Hindi Usage: समीकरण में अनुपातिकता कारक निर्धारित करता है कि एक चर दूसरे के संबंध में कैसे बदलता है।