How do you graph #x \le 8#?
Plotting inequations is the same as plotting equations.
Remove the inequality sign and then plot it. This is the graph of your inequation.
Plot this and you get a straight line parallel to y-axis and passing through x=8.
To solve this graphically, put x=0. You get 0
Now since x=0 satisfies this equation, shade the origin side. This is the graphical solution.