To express the information that an ad costing $66 is 11 lines long as an ordered pair, we can represent the cost and the number of lines as coordinates \((x, y)\).
Let:
- \(x\) represent the cost of the ad,
- \(y\) represent the number of lines.
In this case, the ordered pair would be \((66, 11)\).
So, the ordered pair is \((66, 11)\).