The mathematical requirements of the IB course dictate that students should be able to carry out manipulations with logarithmic and exponential functions (HL only)
In the IB exams before May 2016, it was fairly routine to see a long graph question involving a logarithmic function in Higher Level papers. Since the new specification has been in play, there have been no long logarithmic questions.
However, given the specific mathematical requirements in the specification, I would be prepared for this coming up in future exams.
The good news is that there is loads of practice on this type of question. I’ve put together some practice ones for you.
Hope this helps