Answer
I
Work Step by Step
F is not a function since $x=1$ has two different values for $y$.
G is not a function since $x=0$ has two different values for $y$.
H is not a function since $x=6$ has two different values for $y$.
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 9 - Quadratic Functions and Equations - 9-6 The Quadratic Formula and the Discriminant - Standardized Test Prep - Page 573: 51
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