* Find a data source, with at least 15 points.
* Via code filter out some data to exclude.  You can manually add bad data if you have too.
* Get the dots on the screen.
* Add a best fit line.
* Add a second best fite line (different ploynomial)
* Set the title and the axis title and give each line a name
(add_trace has name and color options)
* The Extra thing!
Due Tuesday Feb 22.

Also, https://stackoverflow.com/questions/22239691/code-for-best-fit-straight-line-of-a-scatter-plot-in-python
Look for "Code and plot"