My DDs are going to IB school and I looked for it before. (They are still in MS :-). It's here.

http://www.unis.org/uploaded/02_ACADEMICS/2014-15/Files_PDFs_(Academics)/IB_Course_Descriptions/SL_Mathematics_Briefmd2.1.pdf

A lot of HS kids prefer AP >IB because it is more flexible. You need the whole 24 credits for IB diploma whereas in AP, you can get more credits on what you have the most strength. So, you will have better weighted GPA.