# What is the domain and range of  y = sqrt(9 + x)?

$D = \left\{x \in R | x \ge - 9\right\}$
$R = \left\{y \in R | y \ge 0\right\}$
Domain: $D = \left\{x \in R | x \ge - 9\right\}$
Range:$R = \left\{y \in R | y \ge 0\right\}$