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So, I'm running into an interesting problem with my residual plot. For reference, I'm trying to model a response variable "exploration" for a social network. Exploration is the number of people you interact with on your team / total number of people interacted. As a result, there is a lower bound of 0 and an upper bound of 1.

I'm receiving a residual plot that is sharply sloping downward. My residual plot

I'm using only one predictor "team size" and I'm using a GLM of the binomial family (with the logit link function). I've attached the GLM's graph below.

enter image description here

Should I be worried about this residual plot? I read in this question that it probably relates to my zero bound. But, they didn't offer any solutions for correction.

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