From Relations to Functions

In this lesson, we learn about going from relationships to functions. We start by understanding the relationship between two coordinate points and the special kind of relationship they share. We then move on to understanding input and output variables, domain and range, and how they relate to each other. The special thing about a function relationship is that every x value is related to a specific output value, making it a unique and easily identifiable relationship. We are given examples of both functions and non-functions to help solidify our understanding.

Going from relations to functions

• What is the difference between a relation and a function?
• State with reasons, whether or not each of the following relations is a function. a) {(1,-1),(2,0),(3,1),(-1,3),(-2,-3)} b) {(3,3),(2,-1),(4,1),(3,-2),(1,2)}