4.4 1

Section 4.4Inequalities in Two Variables

Graphs of Linear Inequalities x + y ≤ 4

Systems of Linear Inequalities x + y ≤ 4 x – y < 4

4.4 2

Checking Solutions

4.4 3

(3,1)

sidethatShade

yes

FTEvaluate

poaPick

linetheGraph

!31?

:/

int

4.4 4

4.4 5

Slope-Intercept Form Predicts Shading

4.4 6

ABOVE BELOWy > 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