9-5 Inequalities in Two-Variables
9P6: Use inequalities
• Inequalities
• 1. Graph using Slope (m) and y intercept (b)
• 2. Decide if line is solid ( ≥ or ≤ )
or dashed ( > or < )
• 3. Shade ALL Solutions
( > or ≥ ) Above line
• ( < or ≤ ) Below Line
•
• Example 1:
• y < 2x -1
• Example 2:
• y≥-x+2
• Example 3:
• x<3
• Example 4:
• 4 ≤ 2x + y
To write an inequality for a graph
Start with
y
mx +b
Fill in alligator (inequality)
and m and b
• Example 7:
Doritos cost $3.00 a bag and 2 Liters cost $1.00. If you are
having a party and don’t want to spend more than $20,
How many of each can you buy?
Assignment
• Day 1: WS
• Day 2: 9-5/419-420/4-32 m4,34-39,46-53