Question 388330
It's actually "ordered pairs" and not "paired orders"



First, graph the line {{{4x+5y=20}}} by plotting the two points (5,0) and (0,4). These are the x and y intercepts. Now draw a line through those points.



Next, pick a test point, say (0,0) and plug it in. So plug x=0 and y=0 to get {{{4(0)+5(0)<=20}}} which simplifies to {{{0<=20}}}. Since the inequality is true, this means that you shade the ENTIRE region that (0,0) is in. Basically, this means that you shade everything below the line.



Let me know if this helps.



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Jim