#### Answer

$f(2,2) = 18$.
$f(-1,4) =-5$.

#### Work Step by Step

We are given the function:
$f(x,y)=x+yx^3$
We plug in the points to find the function values:
$f(2,2) = 2+ 2(2)^3= 2+ 2(8) = 2+116=18$.
$f(-1,4) = -1+ 4(-1)^3= -1+ 4(-1) = -1 -4= -5$.

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Published by
W. H. Freeman

ISBN 10:
1464125260

ISBN 13:
978-1-46412-526-3

$f(2,2) = 18$.
$f(-1,4) =-5$.

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