Answer
Refer to the blue graph below.
Work Step by Step
RECALL:
The function $y=f(x-h)$ involves a horizontal shift of $h$ units to the right of the parent function when $h\gt 0$ and $|h|$ units to the left when $h \lt 0$.
The parent function of the given function is $y=\sqrt{x}$.
The given function is in the same format as the equation in the recall part above, and has $h=4$.
This means that the graph of $f(x)=\sqrt{x-4}$ involves a horizontal shift of $4$ units to the right of the parent function $y=\sqrt{x}$
Thus, to graph the given function:
(1) Graph the parent function $y=\sqrt{x}$ .
(Refer to the red graph in the attached image below)
(2) Shift the parent function 4 units to the right.
(Refer to the blue graph in the attached image above.)
