Question

What is linear and non-linear?

Answer 1

Linear means that the variable only is to the first power. Non-linear means that the variable has a power of more than one.

For example, a linear variable could look like
`x^(1)` or
`x` and a non-linear variable could look like
`x^(2)` or
`x^(3)`

Answer 2

The word 'linear' means something having to do with a line.On a Cartesian Plane, a linear function is a function where the graph is a straight line. The line can go in any direction, but it's always a straight line. A non-linear function has a shape that is not a straight line.