value the b value is 1, then no growth or decay happens. If you are told that the initial value changes by a percent, then we can represent the b value as growth or decay where: 1. Growth is 1+r Decay is 1-r r is the decimal form of the percent Write an equation that represents the following situation Starting value = 125 Rate = 6% growth per year Years 10 years www.ngpf.org Last updated: 12/2/21 2. Write an equation that represents the following situation Starting value = 200 Rate = 2.5% decay per year