Linear Function: These are functions that are easily represented by a straight line.
An example is given thus:

We can plot a T table and a graph to look like so:
Linear non function:
An example is x = 3
NonLinear function:
An example is

Non Linear Non Function
An example is:
![\begin{gathered} x=y^2 \\ \text{Therefore, y=}\pm\sqrt[]{x} \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/tqcgds9y29zttzpffqmmuo3e6oal28jsc2.png)