Current hosted at https://mathbuffet.party
this is based on the excellent tutorial by Ali Spittel, and uses the same technique to generate a slope equation from a drawn line.
Connecting a physical action to the resulting mathematical equation could be helpful for some learners who are more visual and like to "feel" the equations.
It would be nice to eventually have functionality for quadratic equations, but will need time to work on that.
Eventually, learners attempting to draw a line from an equation might be able to get feedback on how close their line is to the equation.