Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
6th Edition
ISBN:9781337111348
Author:Bruce Crauder, Benny Evans, Alan Noell
Publisher:Bruce Crauder, Benny Evans, Alan Noell
Chapter1: Functions
Section1.FR3: A Further Look: Definition Of A Function
Problem 9E
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Question
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Step 1
It is relatively easy to determine whether an equation is a function by solving for y.
A given relation y=f(x) is a function if there is one and only one corresponding y-value for an x-value.
Vertical line test
If any vertical line drawn parallel to the y-axis intersects the graph of the equation more than once for any value of x then the graph does not represent a function.
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