Answer
Linear function.
Work Step by Step
$f(x,y,z) = \frac{x+y-z}{3}$
None of the terms has the product of two variables in it and all of them are linear, therefore it is a linear function.
Finite Math and Applied Calculus (6th Edition)
by Waner, Stefan; Costenoble, Steven
Published by
Brooks Cole
ISBN 10:
1133607705
ISBN 13:
978-1-13360-770-0
Chapter 15 - Section 15.1 - Functions of Several Variables from the Numerical, Algebraic, and Graphical Viewpoints - Exercises - Page 1094: 15
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