Use a graphing calculator to find a model for the given data and give values for a and b, where a and b are constants in the equation

y =
ab^{x}. Leave all commas out of large
numbers and round both a and b to the nearest thousandth.

x |
1 |
2 |
3 |
4 |
5 |
6 |
7 |

y |
89 |
50 |
27 |
16 |
9 |
6 |
3 |

a = _{}

b = _{}