Answer
See graph.
Work Step by Step
Step 1. Recall the basic graph of $y=\sqrt x$ as shown in the figure (red curve).
Step 2. Reflect the curve across the x-axis to obtain the graph of $f(x)=-\sqrt {x}$ (black curve).
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.