This unit plan is a one-week section out of an entire semester math class and we will be developing the concepts regarding functions. The central question to this unit plan is "Where do we find functions in the real world and how can they be applied?" All of the lesson in this unit plan were based off of the central question. We will start the week reviewing the Pythagorean Theorem and how critical the theorem can be in the real world. Then we will move on to defining functions and the basics of using functions as well as graphing them. Then, we will discuss parent functions and how to graph them. Next we will dilate and translate those parent functions to form more functions. Finally, we finish the unit with the composition of functions. We will use real world applications throughout all of the lessons to ensure the students will be able to identify functions outside of the classroom.