The law of variable proportion state that if the quantities of variable factor of production are used with fixed factor, after a certain point,
- each successive unit of the variable factor brings about a decreasing marginal product
-
each successive unit of the variable factor bring about equal increase in marginal product
- each successive unit of the variable factor bring about an increasing marginal product
- each successive unit of the variable factor bring about four time increase in marginal product
- each successive unit of the variable factor bring about more than equal increase in marginal product