| linear_interpolate | Linear interpolation between two values. Returns start + (end - start) * t… |
| exponential_growth | Calculates exponential growth: initial × (1 + rate)^periods |
| decay | Calculates exponential decay: initial × (1 - rate)^periods Requires rate < 1 for meaningful results. |
| compound | Calculates compound interest with specified frequency. Formula: principal × (1 + rate/n)^(n×t)… |
| simple_interest | Calculates simple interest: principal × (1 + rate × time) |
| continuous_compound | Calculates continuously compounded interest: principal × e^(rate × time) The theoretical limit of compound interest as compounding frequency → ∞. |
| present_value | Calculates the present value of a future amount. Formula: FV / (1 + rate)^periods… |
| effective_annual_rate | Calculates the effective annual rate (EAR) from a nominal rate. Formula: (1 + r/n)^n - 1… |