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Intermediate Algebra

OPENSTAX

$Math Studyset 91影视 Explanations$ Math

OER 2017 Edition 路 1346 pages

ISBN: 9780998625720

Chapter 3: Q. 504 (page 361)

Determine whether each equation is a function.
$2 x + y^{2} = 4$

Short Answer

Expert verified

When $x = 2$ , then $y = 0$ this either be positive or negative. Since each value of $x$ does not corresponds to only one value of $y$ the equation does not define a function.