A Line Through the Origin, and the Ratio That Never Moves

A direct proportion is y = kx, a line through the origin whose ratio y/x never moves. Points leak in treating an inverse relationship as direct, assuming proportionality where a fixed fee breaks it, and reporting the constant of proportionality instead of the value asked.

8 STEPS · 6 QUICK CHECKS · y = kx through the origin · k is the tool, not the answer · v1