In this lesson I will introduce you to linear and non-linear functions. The term linear refers to a “line” so a linear function is one that has a graph shaped as a line, y=3x + 1 would be an example of a linear function. On the other hand a “non-linear” function is a function that has a graph that is not a line- examples would be quadratic functions (these are U shaped) and exponential functions which we will look at in the lesson. As we continue our study of functions, you want to broaden your knowledge of the characteristics of the most common functions in middle and high school math- both linear and non-linear. The lesson will also tie into many previous lessons on functions to include translating the graphs of functions and plotting lines. Remember to take good notes and practice.