(

a) Distinguish between linear and non-linear demand functions.

(

b) What is the difference between the following demand functions?

( i) Qx = 1 – 5 Px;

( ii) Qx = 100 – 2 P 2 x

( iii) Qx = Ap– b and

( iv) Qx = ( a/ p +

c) – b