Explain square root function with graph

Explanation

Let f be a real-valued funcation which associates to each non-negative real number x, its non-negative square root.
Then, `f: R_(0)^(+) to R_(0)^(+):f(x)=sqrtx` is called the suare-root funcation.
Domain ` f(x)= R_(0)^(+) and " range " f (x) = R_(0)^(+)`
Some of the graph are (0,0)], (1,1) ,(2,1.4), (3,1.7), ( 4,2) , ( 5, 2.2), etc. joining these point, we get the required graph.