Essentially I have a few data points grouped closely together and they require a linear best fit line. However, the best fit line needs extrapolating to a specific y-axis intercept. I'm not too sure how to approach this. Using a polyfit I get this result:
The y intercept has to be 1.68. So I presume the gradient has to be modified as well as the intercept to get the correct linear best fit line. How would I go about this?