what is the range of this function?

what is the range of this function?
Answer
Answer:
$y\geq0$
Explanation:
Step1: Identify lowest - point
The lowest point of the graph is at $(0,0)$.
Step2: Determine range direction
The graph extends upwards from $(0,0)$ in both directions. So all $y$ - values are greater than or equal to 0.