Question 24076
To graph a linear inequality in two variables (say, x and y), first get y alone on one side. Then consider the related equation obtained by changing the inequality sign to an equals sign. The graph of this equation is a line.

If the inequality is strict (< or >), graph a dashed line. If the inequality is not strict ( or ), graph a solid line.
Example:

Graph the inequality {{{y<=4x - 2}}}. 
{{{graph (400, 400, -6,6, -6, 6,  y=4x-2)}}}
Now, substitute x = 0, y = 0 to decide whether (0, 0) satisfies the inequality

 

This is false. So, shade the half-plane which does not include the point (0, 0). 

Hope this helps
=)