title: How to apply Linear regression on Pivot table (Any chart)
body: <p>We have a customer issues raw data and trying to apply Linear regression on Pivottable.JS. Ex. We have Month(Mon-YY) in X Axis and No. of issues in Y Axis.
  Have written a Linear regression function in Python which returns a Array or any object.
  Let us assume we are using a Bar chart and how to print a linear regression Trend  line above it?</p>