- For the production function F (z1, z2) = z1 + z2, the isoquants are straight lines. Thus the MRTS is constant, not diminishing.
- For the production function F (z1, z2) = z11/2z21/2, the isoquants are rectangular hyperbolae, hence convex to the origin.
Thus the MRTS is diminishing.
- For the production function F (z1, z2) = z12 + z22, the isoquants are quarter circles. Thus the MRTS is increasing, not diminishing.