Question 155282
x=1/2y+1
y/2=x-1
y=x/2-1/2
{{{ graph( 300, 200, -6, 5, -10, 10, x/2 -1/2) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, x/2 -1/2).