Function Notation
Presentation
•
Mathematics
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8th - 10th Grade
•
Medium
+1
Standards-aligned
Kiyana Wilkins
Used 419+ times
FREE Resource
7 Slides • 11 Questions
1
Function Notation
A concise way of substituting specific values for x
Written: f(x)
Read: "f of x"
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Think of a function like a machine ...
Substitute "in" value for x (or other variable)
Calculate "out" value using Order of Operations
3
Think of a function like a machine ...
Substitute "in" value for x (or other variable)
Calculate "out" value using Order of Operations
This example is showing f(x)=5x + 1
This is read f (of x) = 5x plus 1
So, with function notation, the y is replaced with f(x).
4
Function Machine
You will also see this type of function machine.
You can see that x is being put into the machine, and f(x), which is the output, is coming out.
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Multiple Choice
Let's Try it:
If the input is -3, determine the corresponding output.
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Example 1
Here, we're told that our rule is
f(x) = -2x +4 and that x is equal to -3.
When we input -3 into our equation, we get an output of 10.
Make sure you are using FUNCTION NOTATION. f(-3) = 10. This is read f of -3 equal 10.
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Multiple Choice
Find f(x) if x=-2.
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Multiple Choice
f(5) = ?
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Multiple Choice
Find the output.
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Multiple Choice
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Multiple Choice
Find the input of this function machine.
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Multiple Choice
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Poll
What is x if
f(x) = -2?
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What is x if f(x) = -2?
First, we need to locate -2 on the Y axis. REMEMBER, that f(x) = -2 is the same as y = -2.
So the question as, when y = -2, what does x =?
When y = -2, x is equal to 8.
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Multiple Choice
What is f(1)?
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Multiple Choice
What is f(8)?
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Poll
How comfortable are you with function notation? Choose the color based on your answer.
Function Notation
A concise way of substituting specific values for x
Written: f(x)
Read: "f of x"
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