4. Non-Decreasing Function
f( x) is said to be non-decreasing in D1, if for every x1, x2 ∈ D1, x1 > x2 ⇒ f( x1) ≥ f( x2). It means that the value of f( x) would new decrease with an increase in the value of x.
5. Strictly Decreasing Function
f( x) is said to be decreasing in D1, if for every x1, x2 ∈ D1, x1 > x2 ⇒ f( x1) < f( x2). It means that there is a certain decrease in the value c f( x) with an increase in the value of x.
Classification of Strictly Decreasing Function
6. Non-increasing Function