It is given that the Point (a, b) is transformed by the rule (a, b−4) .
We have to identify the transformation which occurred.
Translation is a term used in geometry to describe a function that moves an object a certain distance. Since, a point (a,b) is transformed by the rule (a,b-4). It means that the point (a,b) is transformed to the point (a,b-4). It means that the point goes 4 units downwards. So, it means that the point got translated 4 units down.
Option 3 is the correct answer.