W3_tools Library - Linear Regression

I’m not familiar with that course, but in all the other courses I’ve seen here the utility functions are included in separate python files packaged with each assignment. There’s a topic on the DLS FAQ Thread about how to download all the files in any of the assignments.

If you just want to look at that individual file, click “File → Open” from the running notebook. That will give you a file explorer view of all the associated files. Look for the file w3_tools.py.