A General Hyperbolic Demand Function Has the Form to Follow $q = \frac { m } { p ^ { z } }$

Multiple Choice

A general hyperbolic demand function has the form to follow. $q = \frac { m } { p ^ { z } }$ (s, m - nonzero constants)

Obtain a formula for the elasticity of demand at a unit price of p.

A) $E = s m p$
B) $E = m$
C) $E = s$
D) $E = \frac { s p } { m }$
E) $E = - m p$