Functions and Tables

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Functions and Tables

• By Red E. Ornot

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Our Standards
Maryland VSC Standard - 1.A.1.c Complete a
function table using a one-operation (,-,/,x)
-1.A.1.d Describe the relationship that
generates a one-operation rule.
Maryland Technology Literacy Student Standard
(MTLSS)
- 3.A.1.a Use technology tools, including
software and hardware, from a range of
teacher-selected options to learn new content or
reinforce skills.
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What is a Function?
A function is a rule, sometimes using variables,
that changes a number (input), using
multiplication, division, addition, and/or
subtraction creating a new number (output)
Watch the introduction Movie.
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Functions

• In the incomplete equation 5 ___ ,

Is the input
_____ is the output
5 is the rule
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Practice using a Function

• In the incomplete equation 5 ___ ,

INPUT 2 into
Apply the rule 5
7
2 5 ____
OUTPUT
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Practice using a Function

• Solving the Rule
• If you are given the input and the output, you
  must determine how the number changed using
  addition, subtraction, multiplication, or
  division.

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3
6 ______ 9 7 ________ 10
The rule must be 3 because 6 39 and 7 3
10
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Practice using a Function

• Sometimes we use function machines to determine
  rules of functions.

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The rule of the function
Input
12
4
Output
8
Practice using a Function

• Web practice
• http//www.amblesideprimary.com/ambleweb/mentalmat
  hs/functionmachines.html

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Function Tables
Lets imagine this equation 5 ___
The output is the result of applying the rule (
5)
The input is a number going in.
5 is the rule
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Function Tables
Lets imagine this equation 5 ___
5
10
5 is the rule
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Function Tables
Lets imagine this equation 5 ___
7
12
5 is the rule
12
Function Tables
Lets imagine this equation 5 ___
10
15
5 is the rule
13
Function Tables
Lets imagine this equation 5 ___
13
18
15
20
17
22
5 is the rule
14
Function Tables
15
21
3
10
The rule is x 3
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Function Tables
14
3
16
6
The rule is -6
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Function Tables
1
6
12
28
The rule is 4
17
Function Tables
23
34
22
6
The rule is 13