power curve
/ˈpaʊə kəːv/noun
1 Engineering. A graph showing power as a function of some other variable; specifically a graph of the power output of a vehicle or aircraft against engine speed.
2 Figurative. Chiefly Business. The current thinking or trend.
3 Statistics. A graphical representation of the power function of a statistical test.
Origin
Early 20th century; earliest use found in Philosophical Transactions of the Royal Society of London. From power + curve.