3.7 Graphing Inequalities In Two Variables by qym17251

VIEWS: 12 PAGES: 8

									3.7 Graphing Inequalities In
      Two Variables
• Get y by itself
• Graph
• If ≤ or ≥: use solid line
  If < or >: use dashed line
• If < or ≤: shade below the line
  If > or ≥: shade above the line
Ex1) Graph
              y ≤ -2x
 2x + y ≤ 0

  y ≤ -2x
Ex2) Graph
 -2x + 2y > 2
                y> x+1


  2y > 2x +2
   y> x+1
Ex 2) -3 < x ≤ 4            x≤4
                   x > -3
Ex3) x + y ≤ 4
     x–y<4                y ≤ -x + 4



     y ≤ -x + 4
    -y < -x + 4

    y ≤ -x + 4
    y>x-4
                  y>x-4
Ex4) x + y ≤ 4
     x–y<4                y ≤ -x + 4



     y ≤ -x + 4
    -y < -x + 4

    y ≤ -x + 4
    y>x-4
                  y>x-4
                    y < 2x + 1
Ex 5)                            y >x

   y < 2x + 1
   y >x
  y ≥ (1/2) x - 3                y ≥ (1/2) x - 3

								
To top