Draw the graph function $f$ is defined by

$f\left(x\right)=\left\{\begin{array}{c}1-x,x<0\\ 1,x=0\\ x+1,x>0\end{array}\right.$. 

Draw the graph of the function $f:R\to R$ defined by 

$f\left(x\right)=\frac{\left|x\right|}{x}$

Draw the graph of the function $f:R\to R$ defined by 

$g\left(x\right)=\frac{x}{\left|x\right|}$

Draw the graph of the function $f:R\to R$ defined by 

$f\left(x\right)=\left\{\begin{array}{l}2x+1, \text{if} x\ge 1\\ 2x-1,\text{ if} x<1\end{array}\right.$

Draw the graph of the function $f:R\to R$ defined by 

$y=2x^2$

Draw the graph of the function $f:R\to R$ defined by 

$y=\sqrt{x}$

Draw the graph of the function $f:R\to R$ defined by 

$y=\frac{1}{x}$