Find the missing value in an inverse proportion.
The product of the two quantities stays constant — as one increases, the other decreases proportionally.
Solve: A₁ × B₁ = A₂ × B₂
What's an example of an inverse proportion?
Speed and time, for a fixed distance. If you travel twice as fast, the journey takes half the time. Multiplying them together (which gives distance) always stays the same.