Graphing inequalities in two variablesPresentation Transcript
Graphing Linear Inequalities in Two Variables
SWBAT graph a linear inequality in two variables
SWBAT Model a real life situation with a linear inequality.
Graphing an Inequality in Two Variables Graph x < 2 Step 1: Start by graphing the line x = 2 Now what points would give you less than 2? Since it has to be x < 2 we shade everything to the left of the line.
Graphing a Linear Inequality Sketch a graph of y 3
Some Helpful Hints
If the sign is > or < the line is dashed
If the sign is or the line will be solid
When dealing with just x and y.
If the sign > or the shading either goes up or to the right
If the sign is < or the shading either goes down or to the left
Using What We Know Sketch a graph of x + y < 3 Step 1: Put into slope intercept form y <-x + 3 Step 2: Graph the line y = -x + 3