Question 878761
{{{drawing(300,300,   -6, 6, -6, 6, grid(1), 
graph( 300, 300, -6, 6, -6, 6, 0 ,abs(x)+4 ) )}}}
{{{drawing(300,300,   -6, 6, -6, 6, grid(1), 
graph( 300, 300, -6, 6, -6, 6, 0 , abs(x+4)) )}}}
{{{drawing(300,300,   -6, 6, -6, 6, grid(1), 
graph( 300, 300, -6, 6, -6, 6, 0 ,abs(x-4) ) )}}}
{{{drawing(300,300,   -6, 6, -6, 6, grid(1), 
graph( 300, 300, -6, 6, -6, 6, 0 ,abs(x)-4 ) )}}}