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Compound interest

Interest earns interest. Move the sliders and watch the curve pull away from the straight line.

After 30 years: 7612.26 compound vs 3100.00 simple.

Straight lines

y = m x + b. The slope m is the steepness; the intercept b is where the line crosses the y axis.

Supply and demand

Where the curves cross, the market settles. Shift a curve and see price and quantity move.

Price settles at 40.0, quantity 60.0.