Domain/Range Notations
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October 7, 2014
Pg. 24-25 in Notes
http://mathequalslove.blogspot.com/
Warm-Up – pg. 24
• What is the domain of a function?
• What is the range of a function?
Title – pg. 25
• Domain/Range Notations
Essential Question
• What are the different notations for domain
and range?
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• Fold your paper in half.
Foldable
• Cut 2 lines (making 3 sections) on one half of
the paper.
Label the front flaps.
{ Set Notation }
≤
≠
>
Algebraic Notation
<
≥
=
[ Interval, Notation )
Fill in the inside.
Inside Set Notation Flap
If the graph is discrete:
List all of the inputs or outputs inside squiggly
brackets.
Example: D = { 1, 2, 4, 5, 7 }
Fill in the inside.
Inside Set Notation Flap
If the graph is continuous:
Inside squiggly brackets, define a variable and
describe it algebraically.
Examples:
{ x | x ≥ 5 } or { y | -5 ≤ y < 3 }
Fill in the inside.
Inside Algebraic Notation Flap
Examples:
x > 4 and x ≠ 5
y>5
x≥7
-2 ≤ x < ∞
-∞ < y < ∞
Fill in the inside.
Inside Algebraic Notation Flap
Use equality and inequality symbols and
variables to describe the domain and range.
< , >, ≤ , ≥ , = , ≠
Fill in the inside.
Inside Interval Notation Flap
Examples:
[ 5, 74 )
[ 2, 4 ]
( - ∞, 3 ]
( -100, 4 ] ᴜ [ 17, 23 )
Fill in the inside.
Inside Interval Notation Flap
For each continuous section of the graph, write
the starting and ending point separated by a
comma.
Parentheses: point is not contained in D/R
(open circles, ∞, - ∞)
Brackets: point is contained in D/R
Reflection
• Which notation(s) are new to you?