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

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

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