1:0,25 0,6:0,15

I'm assuming you are giving a set of points with their corresponding values. The given set seems to be 1:0.25 and 0.6:0.15.

In this case, it appears that you have two points: (1, 0.25) and (0.6, 0.15).

To prepare for university exams, it would be helpful to understand what these points represent and how they can be applied in the relevant subject area. It would be great if you could provide more context or specify the subject or topic you are studying, so I can better assist you in your preparation.