Statistics relies on a small toolkit of mathematical ideas. You do not need to memorize formulas; you need to understand what they mean.
Explore growth, logarithms, summation, weighted averages, rates of change, and set operations with six interactive tools.
Simple Final
$150.00
100 + (100 × 5.0% × 10)
Compound Final
$162.89
100 × (1 + 5.0%)^10
Compound Advantage
+$12.89
8.6% more than simple
Simple growth increases linearly. Compound growth multiplies: each year, the interest earns interest. Over 30 years, compound growth can be 2–3× larger.