Answer
Interval Notation: $(-∞,-4]∪[4,∞)$
Graph:
Work Step by Step
$|y| \geq 4$
By the absolute value inequality property,
$|X| \geq a = X \leq -a $ or $X \geq a$
$|y| \geq 4$ is equivalent to
$y \leq -4 $ or $y \geq 4$
Interval Notation: $(-∞,-4]∪[4,∞)$