It seems like a fairly basic question, but there's probably some more science to this. For an automatic-drip coffee machine, how much ground coffee should be used per unit water?
Various sources say that the "industry standard" is 7g (~1 rounded Tbsp) per "cup" (150-175mL, or 5-6 fl.oz.). Is this uniform for any (reasonable) amount of coffee (say, 200mL-4L / 1 cup to 16 cups)? Or would I want, say, a higher ratio of grounds-to-coffee for making 2 cups, than for making 12 cups? I feel like I, personally, tend to use more coffee (per unit water) when making fewer cups (I'm not sure why; shorter extraction time? Matters of water retention? Mere personal preference?).
Surely this also depends on total extraction time and grind level, but perhaps that is a separate question. With due credit, this question was partly spurred from this recent question.