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I am trying to create a scatter chart that also has a trend line following it. In some cases, for example in the image, the trend line is not linear. I know I can replicate this example in a normal scatter chart, by adding the trend data to the dataset and setting drawLine=1 and drawAnchor=0, but I need the zoom functionality for my application. Is there a way to add this sort of line to a zoomscatter chart (or another chart with zoom functionality). Also of note is that the datasets I will be representing typically do not have a common set of x values, which as far as I can tell rules out the use of a chart that relies on categories for the x value.