Envision Math 2.0: Grade 8, Volume 1
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Envision Math 2.0: Grade 8, Volume 1 View details
1. Understand Relations and Functions
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Exercise 2 Page 162

We are asked how to use different representations of relations to determine whether they are functions. Let's begin by recalling the definition of function.

Function

A relation is a function when each input is assigned exactly one output.

Let's take a look at the different ways that we can use to represent relations. These include mapping diagrams, sets of ordered pairs, and tables, to name a few.
relation represented as a mapping diagram, a set of ordered pairs, and a table of values