There are many ways to explain and define this. I will not repeat what is found in book or the web, rather explain an easy way to think of linear and non linear.
Think of a linear map as one that...
Linear equations have a variable only to the first degree(something to the power of 1). For example: 2x + 1 = 5 , 4y - 95 = 3y are linear equations. Non-linear equation have a variable that has a...