An **input-output table** is a two-column table in which the same rule is

applied to each input value resulting in the corresponding output values.

Use an input-output table, substituting 1, 2, 3, and 4 for

*n* in the given expression. The middle column is to show the rule being applied.

Input (*n*) |
*n* + 10 |
Output |

1 | 1 + 10 | 11 |

2 | 2 + 10 | 12 |

3 | 3 + 10 | 13 |

4 | 4 + 10 | 14 |

So, the pattern generated from the expression *n* + 10, for *n* = 1, 2, 3, and 4, is 11, 12, 13, 14.

Multiplication can be used to find a total when a given amount is added multiple times. The middle column is to show the rule being applied.

Number of Batches | Number of Batches × 12 Cookies
[in each batch] | Total Number of Cookies |

1 | 1 × 12 | 12 |

2 | 2 × 12 | 24 |

3 | 3 × 12 | 36 |

4 | 4 × 12 | 48 |

So, the pattern for how many cookies Ellie baked in 1, 2, 3, and 4 batches is 12, 24, 36, 48.