Mathematics
Grade 6
15 min
Graph solutions to one-step inequalities
Graph solutions to one-step inequalities
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Identify and interpret inequality symbols ($<, >, \le, \ge$).
Determine if a given number is a solution to a one-step inequality.
Correctly use open and closed circles to represent boundary points on a number line.
Graph the solution set of one-step inequalities (e.g., $x > 5$, $y \le -2$) on a number line.
Interpret a given graph on a number line and write the corresponding inequality.
Solve simple one-step inequalities and then graph their solutions.
Ever wondered how to show all the numbers that are 'more than 5' or 'less than 10' on a single line? 📏 Let's learn how to draw these 'solution pictures'!
In this lesson, you'll discover what inequalities are, how their solutions are different from equations...
2
Key Concepts & Vocabulary
TermDefinitionExample
InequalityA mathematical statement that compares two expressions using an inequality symbol, showing that one is not necessarily equal to the other.$x > 7$ (x is greater than 7) or $y \le 10$ (y is less than or equal to 10).
Inequality SymbolsSpecial symbols used to show the relationship between two values. They are: $<$ (less than), $>$ (greater than), $\le$ (less than or equal to), $\ge$ (greater than or equal to).The symbol in $5 < 8$ means 'less than'.
Solution to an InequalityAny value for the variable that makes the inequality true. Unlike equations, inequalities often have many solutions.For $x > 3$, numbers like 4, 5, 3.1, and 100 are all solutions.
Number LineA line on which numbers are marked at regular intervals, used to represent...
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Core Formulas
Graphing 'Greater Than' ($>$)
For an inequality like $x > a$, place an open circle at the number $a$ on the number line and draw an arrow extending to the right.
This rule applies when the variable is strictly greater than a number. The open circle shows that 'a' is not part of the solution, but all numbers larger than 'a' are.
Graphing 'Less Than' ($<$)
For an inequality like $x < a$, place an open circle at the number $a$ on the number line and draw an arrow extending to the left.
This rule applies when the variable is strictly less than a number. The open circle shows that 'a' is not part of the solution, but all numbers smaller than 'a' are.
Graphing 'Greater Than or Equal To' ($\ge$)...
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Challenging
How many integers from the set {-5, -4, -3, 0, 1, 2} are solutions to the inequality x + 2 ≤ -1?
A.1
B.2
C.3
D.4
Challenging
The graph shows an open circle on 2 with an arrow pointing to the right. Which of the following inequalities does NOT have this solution graph?
A.x + 1 > 3
B.x - 1 > 1
C.x > 2
D.x + 3 > 4
Challenging
First, solve the inequality p - 6 ≥ -2. Then, determine which statement about its graph is true.
A.The graph has a closed circle at 4 and the arrow points right.
B.The graph has an open circle at 4 and the arrow points right.
C.The graph has a closed circle at -8 and the arrow points right.
D.The graph has a closed circle at 4 and the arrow points left.
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