growth rate

Noun

 * 1) The amount of growth in a quantity per unit of time.
 * A global population growth rate of a constant 100 million people per year means an aging population.
 * 1) The amount of growth in a quantity per unit of time, relative to the amount of the quantity during that time.
 * The growth rate is defined as the change in the dependent variable, Y, for a time period divided by the Y value at the beginning of the period.
 * A constant growth rate produces exponential growth.