Question 622119
Plug in arbitrary x values to get corresponding y values (note: f(x) and y are the same)


Since we're dealing with a square root, it makes sense to plug in perfect squares.


Plug in x = 1


{{{f(x)=2*sqrt(x)}}}


{{{f(1)=2*sqrt(1)}}}


{{{f(1)=2*1}}}


{{{f(1)=2}}}


So we have the point (1,2)


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Plug in x = 4


{{{f(x)=2*sqrt(x)}}}


{{{f(4)=2*sqrt(4)}}}


{{{f(4)=2*2}}}


{{{f(4)=4}}}


So we have the point (4,4)


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Plug in x = 9


{{{f(x)=2*sqrt(x)}}}


{{{f(9)=2*sqrt(9)}}}


{{{f(9)=2*3}}}


{{{f(9)=6}}}


So we have the point (9,6)


Keep doing this until you generate enough points. Three or four points should be enough. 


Once you get your set of points, plot them on a coordinate grid. Then draw a curve (the best you can) through each point.