A linear measurement scale for a variable v is one for which fv (r and s) = afv (r) + bfv(s), where a and b are constants between 0 and 1.

A linear measurement scale for a variable v is one for which fv (r and s) = afv (r) + bfv(s), where a and b are constants between 0 and 1. List two scales for which a = b = 1 and two scales for which both a and b are less than 1.