Designers have provided us with the specification that a font should be rendered with weight 75 Bold.
From one question, I figure that the 100 to 900 range is from what is called Linotype system, or TrueType dimensions, as they are called elsewhere. Also, again the aforementioned question indicates the one digit numbers seem to be from the so-called Panose system.
Is it legitimate to simply assume the range from 100–900 proportionally matches the range from 2–9, as is implied in a question? I am also wondering about this as, for instance, the WPF values slightly exceed that range by using value 950 (not that this would be a problem if I assume a linear relationship).