Adding gradient information for the trendline

[volokh1]

I have added the trendline, but the most interesting information for me is its slope/gradient. Could it possible to make this information available so I can not only draw the trendline but also display the value of its gradient?

Thanks a lot!

[Makanz]

I don´t have any plans to add this information but feel free to contribute with a PR if you have the possibility.

[shkuviak]

I think that you can access it via the scale property:

chartjs-plugin-trendline/src/chartjs-plugin-trendline.js

Lines 200 to 205 in 6601aae

	scale: function () {
	var det = this.count * this.sumX2 - this.sumX * this.sumX;
	var scale = (this.count * this.sumXY - this.sumX * this.sumY) / det;
	return scale;
	},