[angelaseyb23@gmail.com]

Is it possible to show two broad lines encompassing the data on either side of the regression line?

[Dan Damelin]

There is no way to show two lines on either side of the regression line, but you could check the box next to “Show Confidence Bands” and this will show two lines on either side of the regression line and indicate the confidence of the fit.You can add one arbitrary line using the “Movable Line” but that likely won’t help with your issue.

[Dan Damelin]

This issue has been answered here: https://codap.concord.org/forums/topic/regression-line-broad-boundaries/#post-8073

But I had another couple of ideas:

1. You could open the graph in the draw tool (see camera icon) and annotate it any way you like.

2. You could put the image online and import it, then make the graph transparent in the style palette (paint brush), adjust the scale of the graph using the axes, and overlay the graph on your image.

See CODAP doc shared here.

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