Logarithmic Spiral Regression

In nature, logarithmic spirals are nearly as ubiquitous as circles. Golden spirals are a specific logarithmic spiral with growth factor of approximately 0.30634896253. Although golden spirals are often confused with the more general logarithmic spiral, golden spirals are not common, and may not exist in the natural world.
Move the circles to adjust the pictures and spirals. Use the reset icon to return the spiral to a golden spiral.