#### Answer

$$r(t)=(3,2,t).$$

#### Work Step by Step

Since the vertical lines passing through $(3,2,0)$ can be written as $(3,2,z)$, then we can put $z=t$ as a parameter and hence
$$r(t)=(3,2,t).$$
(Where $t$ can be any real number.)

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Published by
W. H. Freeman

ISBN 10:
1464125260

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

$$r(t)=(3,2,t).$$

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