1. Unit 5 Functions Pre-Algebra CCSS Heading
Functions can be represented by:
Graphs Tables Mappings Ordered Pairs Function Rules
Heading
Unit 5
Functions
Pre-Algebra CCSS
( , )
f(x) = 2x + 1
g(x) = 4x
h(x) = x2 – 1
Input
Output

2. A special relation that has EXACTLY ONE OUTPUT for each input
VOCABULARY! EXAMPLES!
Relation:
Function:
Input (or Domain):
Output (or Range):
Note: When writing the domain and range: List values in ______________ and do not __________________ values.
A set of ordered pairs
A special relation that has
EXACTLY ONE OUTPUT for each input
(or exactly ONE y-value for each x-value)
The value substituted into a function. The set of all x-values
The value that results when an input is substituted into a function.
The set of all y-values
order
repeat

3. Taken from Pre-Algebra 8 Sem1 Practice Exam B
Taken from Pre-Algebra 8 Sem1 Practice Exam B Taken from old Algebra I Honors Sem1 Practice Exam (revised 2009)
What is the domain of the following function? {(–3, 1), (–2, 7), (4, 2), (2, 5)}
A. C.
B. D.
Taken from Pre-Algebra 8 Sem1 Practice Exam C

4. Mapping Diagram:
Tell whether or not the relation is a function. If not, state why. If so, state the domain and range.
List the domain values (on left) in order and the range values (on right) in order. Draw arrows from the domain values to their range values.
( , )