Creating Pattern Rules from Models

How can we describe a pattern?

Learning Goal We are learning to use algebraic expressions to describe patterns

Definitions Algebraic expression: a combination of one or more variables; it may include numbers and operation signs Variable: a letter or symbol, such as a,b, or n, that represents a number/place holder for the unknown value Constant: a numerical value that stays the same/a quantity that doesn’t change

Example Variable Constant

Example Variable (blue squares) changes with figure number Constant (red squares) stays the same for each figure; 2 red squares each time Algebraic expression: n + 2

Practice Pg. 128 #s 3-8