
Introduction to Inequalities
Presentation
•
Mathematics
•
KG
•
Practice Problem
•
Medium
Standards-aligned
Jennifer Jones
Used 3+ times
FREE Resource
13 Slides • 21 Questions
1
Introduction to Inequalities
2
INEQUALITY
3
Key phrases:
4
Key phrases:
5
Key phrases:
6
Key phrases:
7
Multiple Choice
A student must be at least 16 years old to obtain a driver’s license.
x > 16
x < 16
x ≤ 16
x ≥ 16
8
Multiple Choice
Which sign matches this phrase?
There are fewer than 50 people allowed in this area.
x > 50
x < 50
x ≤ 50
x ≥ 50
9
Multiple Choice
Which sign matches this phrase?
I need at least 30 orders to meet my goal.
x > 30
x < 30
x ≤ 30
x ≥ 30
10
Multiple Choice
Which sign matches this phrase?
I see more than 15 seagulls.
x > 15
x < 15
x ≤ 15
x ≥ 15
11
Multiple Choice
x > 12
x < 12
x ≥ 12
x ≤ 12
12
Multiple Choice
Which sign matches this phrase?
I can spend no more than $20 at the store.
x > 20
x < 20
x ≤ 20
x ≥ 20
13
SOLUTION OF INEQUALITY
Inequalities have Solution Sets - The numbers in the solution set satisfy the inequality - they make the inequality true.
14
Multiple Select
Choose all of the values that ARE in the Solution Set of the inequality below.
x<5
4
3
5
0
-4
15
Multiple Select
Choose all values of x that are a solution for the inequality.
x≥(−15)
-15
-5
0
3
-19
16
Multiple Select
Choose all values of x that are a solution for the inequality.
x≤(−7)
-8
-7
7
-53
-3
17
GRAPH OF INEQUALITY
All Numbers in the Solution Set have shading above them.
Open circle is used when a number is not a solution < or >
Closed circle is used when a number is a solution ≤ or ≥
When you graph an inequality, you must have a STARTING POINT which is either an open or closed circle.
18
GRAPH OF INEQUALITY
Notice all of the inequalities below have a STARTING POINT of 3.
When the variable is LARGER than the number shade to the right.
When the variable is SMALLER than the number shade to the left.
19
The starting point is 2. The SOLUTION SET consists of all numbers larger than 2 only. There is NOT shading above the 2 but there is shading above all numbers to the right of 2.
20
The starting point is 2. The SOLUTION SET consists of all numbers larger than 2 OR greater than 2 because there is shading above the starting point and all numbers to the right of 2.
21
Multiple Choice
x > 45
open
closed
22
Multiple Choice
When graphing an inequality, if the starting point is shaded, that means the starting point is ___________ in the Solution Set.
Not included
Included
23
Multiple Choice
When graphing an inequality on a number line, these symbols require you to put an open circle above the starting point.
< >
≤ ≥
24
Multiple Choice
If you were to graph the inequality below, you would shade to the _________ x≤9
left
right
25
Multiple Choice
If you were to graph the inequality below, you would shade to the _________ x<17
left
right
26
Multiple Choice
A
B
C
D
27
GRAPH OF INEQUALITY
28
Multiple Choice
Choose the correct inequality statement to match the graph in the picture.
x>4
x<4
x≥4
x≤4
29
Multiple Choice
Choose the correct inequality statement to match the graph in the picture.
x>3
x<3
x≥3
x≤3
30
Multiple Choice
Choose the correct inequality statement to match the graph in the picture.
x>−7
x<−7
x≥−7
x≤−7
31
Multiple Choice
BE CAREFUL HERE! NOTICE THE VARIABLE IS ON THE RIGHT SIDE - SEE IF YOU CAN CHOOSE THE CORRECT INEQUALITY.
Choose the correct inequality statement to match the graph in the picture.
−8>x
−8<x
−8≥x
−8≤x
32
Multiple Choice
BE CAREFUL HERE! NOTICE THE VARIABLE IS ON THE RIGHT SIDE - SEE IF YOU CAN CHOOSE THE CORRECT INEQUALITY.
Choose the correct inequality statement to match the graph in the picture.
2>x
2<x
2≥x
2≤x
33
Poll
How do you feel about the material in this lesson?
1 = "I am totally confused"
3 = "I still have questions"
5 = "I understand completely"
1
3
5
34
SOLUTION OF INEQUALITY
Now complete the Quizizz Assignment the covers this topic (Lesson 2.1)
Introduction to Inequalities
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