"If lower production consistently meant higher values, the data points would show a nice diagonal slope from the top left to the bottom right. Instead, it looks like an L shape. This tells us that, over all, there’s actually not much of a relationship. " I disagree. The L-shape does indicate a clear relationship, which is more clearly visible when viewed on log-log axes. If there was a shapeless cloud of points, that would indicate there is no relationship.
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