The letter-sized semi-log paper has a logarithmic horizontal axis (one decade) and linear vertical access. It is in portrait (vertical) orientation. The letter-sized semi-log paper has a linear horizontal axis and logarithmic vertical axis (one decade). It is in portrait (vertical) orientation. The letter-sized log-log paper has a logarithmic horizontal axis (one decade) and logarithmic vertical access(one decade). It is in portrait (vertical) orientation...