What I see in that slide deck is a lack of references (talking about a source is not the same as actually providing the reference so that the reader can check the source directly). I also see the wrong kind of statistical analysis being used for the graph type. The graphs in the figure are all scatter plots; the correct correlation to use is the R-value, not the R-squared value. And the authors are making the claim that opioid overdose deaths are unrelated to opioid prescribing, but completely fail to mention that opioid addicts turn to street drugs as the addiction develops. Yet this is a crucial component of the current opioid crisis. People are dying of street drugs that they are taking because they are more potent and cheaper than prescription drugs, but many of them originally became addicted because of the prescriptions.