# Chapter 2 - Review Exercises - Page 233: 17

$y$ is a function of $x$

#### Work Step by Step

$y=\sqrt {1-x}$ So, for each value of $x$ in the domain we will find one and only one value of $y$. For example, if $x=-3$ $y=\sqrt {1-(-3)}=\sqrt 4=2$

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