I'm having a hard time understanding how to calculate this. I'm getting an answer of 3.33K which is not listed in the answers. Am I doing something wrong here or is the answer not given?
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Technically, 0V is the maximum output and -8.25 would be the lowest
LSB voltage is -5*Rx/300000
4 bits would be Vout = -5*15*Rx/300000
Solving for Rx yields 33K which still isn't in the list of answer, so it looks like 37.5K is the closest which would produce down to -9.375