PREC11 Unit1 notes

# The range of a relation is the set of all the y

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: et of ordered pairs. A relation can be defined by: • a set, { (−1,1) , (0,0) , (1,1) , (2,4) } • a table of values x y −1 0 1 2 1 0 1 4 • an equation, y = x2 where x ∈ and −1 ≤ x ≤ 2 • a mapping diagram x y −1 0 0 1 1 4 2 • a graph. y 4 1 −1 0 1 2 x The domain of a relation is the set of all the x-coordinates from the relation. The range of a relation is the set of all the y-coordinates from the relation. exercise: In the above example, domain = exercise: In the above example, range = exercise: Write the domain and range of each relation graphed using set notation and as intervals. a) b) c) (0,3) (3,0) (0,−3) Unit 1 – Day 2: Functions Review and Quadratic Functions Page 2 of 4 A function is a special type of relation. In a function, every x-value from the domain is paired with just one y-value. A relation is not a function if there is an x-value that is paired with more than one y-value. function x → y = x2 → y not a function x = 4 → x = y2 y=2 y = −2 x = 2 → y = 4 x = −2 → y = 4 The Vertical Line Test for a Func...
View Full Document

## This document was uploaded on 02/16/2014 for the course MATH Pre-Calcul at Holy Cross Regional High School.

Ask a homework question - tutors are online