1. Section 4.4 Inequalities in Two Variables
Graphs of Linear Inequalities
x + y ≤ 4
Systems of Linear Inequalities
x – y < 4
4.4

2. Checking Solutions
4.4

3. (3,1)
4.4

4. 4.4

5. Slope-Intercept Form Predicts Shading
4.4

6. ABOVE BELOW y > mx + b y < mx + b
4.4

7. Horizontal & Vertical Lines
4.4

8. Systems of Two Linear Inequalities
Graph the first one, shading the solution
Graph the second, shading in a different way
Highlight the double-shaded areas
4.4

9. (not a 3-D graph) Systems of Three Linear Inequalities
Graph all three, looking for the common area
4.4

10. Next Section 5.1 Introduction to Polynomials & Polynomial Functions
4.4