function tables
TRANSCRIPT
Functions and Tables
By: Red E. Ornot
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.
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.
Functions
In the incomplete equation + 5 = ___ ,
Is the input
_____ is the output
+ 5 is the rule
Practice using a Function
In the incomplete equation + 5 = ___ ,
INPUT 2 into
Apply the rule + 5
2 + 5= ____ OUTPUT7
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.
Practice using a Function
6 ______ = 9 7 ________ = 10
The rule must be + 3 because 6 + 3=9 and 7 + 3 = 10
+ 3 + 3
Sometimes we use “function machines” to determine rules of functions.
Practice using a Function
The rule of the functionInput
Output
12
8
+ 4
• Web practice
• http://www.amblesideprimary.com/ambleweb/mentalmaths/functionmachines.html
Practice using a Function
Function Tables
In Out
The input is a number going in.
Let’s imagine this equation + 5 = ___
The output is the result of applying the rule ( + 5)
+ 5 is the rule
Function Tables
In Out
Let’s imagine this equation + 5 = ___
+ 5 is the rule
5 10
Function Tables
In Out
5 10
Let’s imagine this equation + 5 = ___
+ 5 is the rule
7 12
Function Tables
In Out
5 10
7 12
Let’s imagine this equation + 5 = ___
+ 5 is the rule
10 15
Function Tables
In Out
5 10
7 12
10 15
Let’s imagine this equation + 5 = ___
+ 5 is the rule
13 1815 2017 22
Function Tables
In Out
6 18
4 12
5
7
9
30
1521
3
10
The rule is x 3
Function Tables
In Out
18 12
10 4
20
9
10
0
143
16
6
The rule is -6
Function Tables
In Out
20 5
8 2
4
24
3
7
16
12
28
The rule is ÷4
Function Tables
In Out
17 30
1 14
10
21
35
19
2334
22
6
The rule is + 13