How do you graph y=sqrt(x-3) and how is it different from the parent function?

Jul 7, 2015

You take values for $x$, preferably values that are a square +3.

Explanation:

In that case you'll get "easy" values for $y$
$x = 3 , 4 , 7 , 12$ will yield:
$y = 0 , 1 , 2 , 3$

This is an $x$-translation from $\sqrt{x}$. The whole function is moved $3$ to the right, as now $x = 3$ will give $y = 0$
graph{sqrt(x-3) [-1.12, 18.88, -1.32, 8.68]}