## Descartes's machine used to plot points on the graph of a logarithm function
Check all boxes in order to see the stages of the construction.
Move points H and A_1 to adjust the shape of the graph.
Descartes's mean proportionals/logarithm machine can be used to plot points on the graph of a logarithm function, y=log_b(x). The base b of the logarithm can be changed by adjusting points H and A_1.
See Descartes's Logarithm Machine for a full explanation.
Related demonstration files:
Similar right triangles
Geometric means
Descartes's mean proportionals/logarithm machine
Descartes's machine used to solve a "two mean proportionals" problem
Descartes's machine used to plot points on the graph of a logarithm function
Descartes's construction used to find the slope of a tangent to a logarithmic graph
Susan Addington, Created with GeoGebra |