What an exchange rate of 1-9 between the European euro and Mexican pesos means?

When the exchange rate is 1-9, it means that one euro can be exchanged for nine Mexican pesos. In other words, one euro is worth nine times more than one peso.

For example, if you have one euro, you can exchange it for nine pesos. Conversely, if you have nine pesos, you can exchange them for one euro.