Question 673677
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
5x+10y=-20 
 x + y = -5
     y = -x - 5  || (0,-5) and (-5,0) on this line.  Plot, connect with line (Green Line)

need to Plot Points: they are Linear (Blue Line) y = .35x + 1.5
x	y
4	2.9
9	4.65   {{{ m = (4.65-2.9)/(9-4) = .35}}} y = .35x = b, use a Pt or find b
14	6.4
21	8.85
27	10.95

3/4 (5x-y)<3
{{{ 5x-y < 3*(4/3)}}}
     5x - y < 4
      5x-4 < y   ||Line y = 5x-4  (0,-4) and (4/5,0) on this line
Plot points, connect with Line and "Shade above that Purple Line" to graph y>5x-4
 {{{drawing(300,300,   -6, 6, -6, 6,  grid(1),
circle(0, -5,0.3),
circle(-5, 0,0.3),
circle(.8,0,.3),
circle(0, -4,0.3),
graph( 300, 300, -6, 6, -6, 6,0,-x - 5 ,.35x + 1.5,5x-4   ))}}}