Created with gnuplot using the following input file:

set terminal svg font "Bitstream Vera Sans,18" size 600,300
set output "Square_root.svg"

set xrange [0:25]
set yrange [0:5]
set xzeroaxis linetype -1
set yzeroaxis linetype -1
set xtics axis nomirror
set ytics axis nomirror
set mxtics 5
set key off
set grid
set border 0

set samples 400

plot x**0.5 with line linetype rgbcolor "red" linewidth 2

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