A pattern rule describes how a pattern is generated or repeated, such as adding or subtracting a constant amount, multiplying by a simple whole number, or repeating a cycle of elements. The rule can be expressed in words, a table, a sequence, or a visual representation and used to determine missing or later terms, rather than merely listing observed terms; formal algebraic formulas, variables, and generalized proofs are not included.
A pattern rule tells how to get from one term to the next. Look for what changes each time.
Example: Find the rule and the next two numbers.
Step 1: Compare neighboring numbers.
The same change happens each time.
Step 2: Say the rule in words.
The rule is: Add each time.
Step 3: Use the rule to find the missing terms.
Starting with :
So the completed pattern is
The pattern rule is add each time.
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