19 points ! complete the table and pattern. determine the common difference. write the explicit rule.

4.

n   |    1     |   2    |   3   |   4   |   5    |   6   |

f(n)|  -20  | -17.5 |  -15  |-12.5|  -10  | -7.5 |

First term: -20     Common Difference: 2.5

Explicit Rule:         Recursive Rule:

5.

n   |    1     |   2    |   3   |   4   |   5    |   6   |

f(n)|  123  |  131   | 139 | 147  |  155  | 163 |

First term: 123      Common Difference: 8

Explicit Rule:         Recursive Rule: