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Unit 2 Function Notation.notebook
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September 25, 2014
What is a Function? One input (domain) gives one output (range)
How to test for a function Vertical Line Test
Function Not a Function
Vertical line hits the graph more than once
Vertical line hits the graph
only once
Is this a Function?
Age
0
10
20
30
40
Heart Rate
120
103
78
88
90
Weight
3
5
8
11
18
Cost
14
17
17
21
22Yes Yes
Speed
25
35
35
55
65
Time
8
6
5
2
2No
Unit 2 Function Notation.notebook
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September 25, 2014
Function Notation: f(x)
A function can be thought of as a machine that assigns one output to every input.
f(x) = 3x + 4
Name of the function
Tells what number to plug into the function
The output of the function. Similar to "y"
The function
foldable
independent variable
dependent variable
To illustrate:f(2) f(1)2 1
3(2) + 4 3(1) + 4
10 1f(2) = f(1) =
Unit 2 Function Notation.notebook
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September 25, 2014
Complete the first 4 questions on the foldable
Let andFind the following values:
f(3) =
g(3) =
f(2) =
g(6) =
Combining Functions: Let
f(x) + g(x) =
f(x) - g(x) =
f(x) * g(x) =
and
Unit 2 Function Notation.notebook
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September 25, 2014
Complete the next 4 questions on the foldableLet and
f(x) + g(x) =
f(x) - g(x) =
g(x) - f(x) =
f(x) * g(x) = FOIL
Distribute the negative
Distribute the negative
Combine like terms
Compositions of Functions: fog(x) = f(g(x)) = f(x) o g(x)
f(g(x))
g(x) goes INSIDE of f(x) replacing the x with the g(x) function
g(f(x))
f(x) goes INSIDE of g(x) replacing the x with the f(x) function
andLet
Unit 2 Function Notation.notebook
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Complete the next 2 questions on the foldableLet and
Complete the next 2 questions on the foldable
Let and
Unit 2 Function Notation.notebook
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Compositions with numbers: you have 2 optionsandLet
Option 1: find f(g(x)) and then plug in x = 4 Option 2: find g(4) and then plug this into f
now plug in x = 4now plug 15 into f
Complete the last 2 questions on the foldableLet and
Option 1:
Option 2:
Option 1:
Option 2:
Unit 2 Function Notation.notebook
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Exponent Rules:
foldable
Scientific Notation a method of writing numbers by using powers of 10
Right 5Left 7Right 6Left 4
foldable
Unit 2 Function Notation.notebook
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September 25, 2014
Simplifying Scientific Notation
scientific notationstandard notation
Ex.1:
Ex.2:
scientific notation
standard notation
Scientific Notation: Algebra 2 Text, page 38, questions 19, 34, 35, 36
Unit 2 Function Notation.notebook
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September 25, 2014
Scientific Notation: Algebra 2 Text, page 38, questions 19, 34, 35, 36
19)
34) 36)
35)
Square and Cubic Roots
means: 2 x 2 = 4 and 2 x 2 = 4
means: 2 x 2 x 2 = 8
means: 2 x 2 x 2 = 8
For even roots ALWAYS think about the positive and negatives
For odd roots get ONLY ONE answer
radicand
radical symbol
if YOU put the square root, YOU have to put the + and
Unit 2 Function Notation.notebook
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Square and Cubic Roots
Property Numbers Algebra
Product Property of Square Roots
Quotient Property of Square Roots
Simplest Radical Form
Square and Cubic Roots Adding & Subtracting
Combine "Like Radical Terms"
ex:
ex:
not like terms
ex:
Unit 2 Function Notation.notebook
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September 25, 2014
Rationalize the Denominator
Math etiquette don't leave a radical in the denominator
ex:
multiply by the number "1", but in a form to eliminate the radical in the denominator
Rationalize the Denominator
ex:
move the negative to the top
split the 18
simplify/reduce
ex:
Unit 2 Function Notation.notebook
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Rational ExponentsRational can be written as a fractionRational exponents exponents that are fractions
basetells you the root
tells you the power
Rational Exponents
ex:
ex:
ex: