How the calculator solves for growth rate
If a value grows by the same percentage every period, it follows A = P(1+r)^t. When the starting value, ending value, and time are known, the equation can be rearranged to solve for r.
What the result represents
The output is the constant percentage increase per period, not the total increase over the whole interval. The curve verifies that applying that same rate repeatedly reaches your supplied final value.
When this is useful
This pattern appears in finance, business metrics, traffic growth, and any context where a start value and end value are known and you want the steady per-period rate behind them.