Function Tables
Lesson
Topic Index | Grade 4 Math | Elementary Test Prep | StudyZone

 A function table is a table of order pairs that follow a rule.
 
INPUT x 6 9 12 15
OUTPUT y 4 7

A rule tells how one number is related to another.
Rule: Subtract 2
x-2=y

6-2=4
9-2 =7
 

So, the next two numbers are 10 and 13.

How can you find a rule and complete the table?

You can use number patterns to complete a table.

The number pattern is the rule for the table. 

You always look for the pattern from the
                         INPUT to the OUTPUT.

INPUT 6 10 15 18 20 23
OUTPUT 10 14 19

What's the Rule?____________________

What do you have to do to each INPUT number to get the OUTPUT number below it?

6+4=10   10+4=14   15+4=19

  • You add 4 to each INPUT number to get the OUTPUT number.

  • The rule for this table is Add 4. 

  • Use the rule to complete the table. Then write the rule.

INPUT 6 10 15 18 20 23
OUTPUT 10 14 19 22 24 27

  Rule:    Add 4     

 
Let's Practice!

click here

 
Topic Index | Grade 4 Math | Elementary Test Prep | StudyZone

Created by Nicole Freebern
Copyright 2001-06 Oswego City School District