Suggestions from DC

[dicook]

1. Reset should just remove the previous line and allow re-draw. Right now it generates a new data set. You could have an extra button to try a new one.
2. Use the penguins data instead of the iris data in your example
3. I don't understand the "Change Data" interface. I'd like to have some nonlinear examples provided randomly, but that's not an option.
4. Is it possible to overlay a best fit line afterwards as a way of showing how close people got to that?
5. It's really hard to draw the line using a finger press on trackpad, line is very wiggly and not where I'd really like it. Maybe it is better for an iPad display with a pen. Might want to keep track of this for collecting data.