# How to graph f(x) = square root of 2x-4 ??

Apr 17, 2018

It depend whether you are asking if $f \left(x\right) = \sqrt{2 x - 4} \mathmr{and} \sqrt{2} x - 4$
In either case you would start off with the same steps..

#### Explanation:

Start by stating where $x$ is defined...
In the equation  f(x) = sqrt (2x-4 , the domain of the function would be $\left[2 , \infty\right)$
So you can start the equation at x=2 and get the point (2,0)
Then from there I would suggest pick two more $x$ values, and plug them into the equation f(x) = sqrt (2x-4 two get two more points such as $\left(2.5 , 1\right) \mathmr{and} \left(4 , 2\right)$
Plot these three points on a graph and then continue the line leftward. The graph then should resemble this one below graph{sqrt (2x-4 [-10, 10, -5, 5]}
I hope this helped....