Using Expressions to Describe Patterns

Using Expressions to Describe Patterns

How can you write expressions to describe patterns?

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First, find the rule.

The rule is divided by 6, so to find the missing value, I divide the top number by 6 to get the bottom number.

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Writing an Algebraic Expression

1. Find the rule.

2. Add a variable to the rule to make an algebraic expression.

Write an algebraic expression describing this table.

• Find the rule: Multiply by 12

• Add a variable to make an expression: S x 12 (or 12s)

Multiple Choice

Which expression describes this table?

• M x 3

• M / 3

• M + 3

• 3 - M

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Poll

How do you feel about writing expressions to describe tables?

• Great

• So-So

• Confused