1. 2.8 inequalities September 19, 2011
Graph each set of numbers on a number line.
1. ­3, 7, ­9
­10 ­9 ­8
2. ­2, ­10, ­8
­7 ­6 ­5 ­4 ­3 ­2 ­1 0 1 2
Be
3 4 5 6 7 8 9 10
3. 3, ­6, 10
llw
or
Solve
4. 4(y+2) = 13 k
5. 6z +1 = 19
Objective ­ graping and writing inequalities
HW pg. 104 #2­32 even 1

2. 2.8 inequalities September 19, 2011
Inequality ­ >, <, ≤, ≥
Graph the following on a number line.
x > 3
­10 ­9 ­8 ­7 ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 7 8 9 10
x < ­4
HW pg. 104 #2­32 even 2

3. 2.8 inequalities September 19, 2011
Graph the solutions of the inequality.
z < ­2 4 > t
­10 ­9 ­8 ­7 ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 7 8 9 10
a ≥ ­5 2 ≥ c
HW pg. 104 #2­32 even 3

4. 2.8 inequalities September 19, 2011
Write the inequality that represents the situation.
­3 ­2 ­1 0 1 2 3 4
HW pg. 104 #2­32 even 4

5. 2.8 inequalities September 19, 2011
Write the inequality shown in each graph.
­3 ­2 ­1 0 1 2 3 ­3 ­2 ­1 0 1 2 3
HW pg. 104 #2­32 even 5

6. 2.8 inequalities September 19, 2011
Food can be labeled low sodium if it meets the requirement established by the
federal government. Use the table to write an inequality for this requirement.
Label Definition
Sodium­free food Less than 5 mg per serving
Very low sodium food At most 35 mg per serving
Low­sodium food At most 140 mg per serving
A certain food is labeled sodium free. Write an inequality for n, the number of
milligrams of sodium in a serving of this sodium­free food.
HW pg. 104 #2­32 even 6

7. 2.8 inequalities September 19, 2011
HW: pg 104 # 2 ­ 32 even
HW pg. 104 #2­32 even 7