Post on 14-Dec-2015
Warm Up 1) Solve by graphing 2y = x + 3 2x + y = 4
2) Solve by substitution 2x + y = 5 4x + 2y = 5
3) Solve by elimination x – y = 7 3x – y = -19
Turn in stamp sheets today!
Step 1) Put the inequalities into slope-intercept form.
y = mx + bslope
y-intercept
We show the solution to a linear inequality with a graph.
Step 2) Graph the line
a) If the inequality is < or >, make the lines dotted.
b) If the inequality is < or >, make the lines solid.
Step 3) Shade the correct region of the graph:
a) Above the line b) Below the linefor y > or y . for y < or y ≤.
**This is because more then 1 ordered pair can be a solution!
Steps to Graphing a System of Inequalities:1) Put the inequalities into slope-
intercept form.2) Decide if the lines should be dotted or
solid3) Shade above for y > or y , shade
below for y < or y ≤.4) Shade the overlapping section darker
to show where the solutions to both inequalities lie.