I am learning machine learning and statistics in python. I have plotted sample data and fitted a regression line:
The author says that there is an inflection point between week 3 and week 4. Please correct me if I am wrong, isn't an inflection point the point where the curve switches from being concave to convex and vice-versa? If so, I don't see it happening in this graph. Does someone see it? Thank you for your time!