Hello @helphelphelphe,
How are you doing? In this case, the Linear Model would be (D) or the Bottom Right. Why? The plots on the graphs are all together going somewhere, but of course its normal to have variety. The line, has to be closest to the middle of the plots as possible. The line works as the estimate of the plots. I hope I helped! Good luck, and contact me if you have any problems!
Thank you,
Darian D.
