Agenda

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Agenda Lesson 4 3 Function Rules, Tables and
Graphs
Warm up/Attendance Warm Up Review Notes
Function Rules Practice Review
Homework Page 191 Problems 40 to 45 all
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Warm Up
Find the domain and range of each relation.
Determine if each relation is a function, using a
mapping diagram
1. (2, 3), (2, 5), (2, 6), (2, 4)
2. (3, 2), (5, 2), (6, 2), (4, 2)
3 (3, 3), (5, 5), (6, 6), (4, 4)
Homework Page 191 Problems 40 to 45 all
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Function Rule an equation that describes a
function
Domain is the set of input values
Range is the set of output values
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x 6
x 4
x 2
y 10
y 16
y 22
Input Output
x y



6 22
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Input Output
x y



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Function Notation a function that uses f(x) for
the output.
Example y 3x 2 becomes f(x) 3x 2
f(x) is pronounced f of x or f is a function
of x
The notation g(x) and h(x) also indicate
functions of x
Input values are called the independent variables
Output values are called the dependent variables
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Evaluating a function rule
Evaluate f(x) 3x 10 for x 6
f(x) 3x 10
f(6) 3(6) 10
f(6) 18 10
f(6) 28
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Evaluating a function rule
Evaluate the function rule f(a) 3a 5 to find
the range of the function for the domain -3, 1,
4
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Application
Suppose your group recorded a CD, now you want to
copy and sell it. One company charges 250 plus
3 per CD. The total cost P(c) depends on the
number of CDs burned. P(c) 250 3c
C P(c) 250 3c (c, P(c))
100 250 3(100) 550 (100, 550)
200 250 3(200) 850 (200, 850)
300 250 3(300) 1150 (300, 1150)
500 250 3(500) 1750 (500, 1750)
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Class work Please do now Page 190 Problems 2 to
18 even
For problems 10 to 16 use the domain -1, 0, 1
to make a table only
Homework Page 191 Problems 40 to 45 all
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Agenda Lesson 4 3 Function Rules, Tables and
Graphs Day 2
Warm up/Attendance Warm Up Review Notes
Function Rules Practice Review
Homework Page 191 Problems 47 to 52 all
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Warm Up
Find the range for the given f(x) using the
domain -1, 1, 3
1. f(x) 2x 4
2. f(x) 5 3x
Homework Page 191 Problems 47 to 52 all
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Graphing Functions
Graph the function y x 1. Find the domain
and range.
x y





Domain All real numbers
Range y y gt 1
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Identify Functions
Find the domain for each relation determine if
the relation is a function.
1. y 3x 2
3. x y2
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Class work Please do now Page 191 Problems 20
to 36 even
Homework Page 191 Problems 47 to 52 all
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(No Transcript)