Two quantities 
and 
are said to be inversely proportional (or "in inverse proportion") if 
for a nonzero constant
of variation 
.
This relationship is commonly written 
.
Inversely Proportional
See also
Constant of Variation, Directly Proportional, Inverse Variation, ProportionalExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Inversely Proportional." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/InverselyProportional.html