IB math studies and calculus

[ucbalumnus]

http://www.ibo.org/programmes/diploma-programme/curriculum/mathematics/mathematics/ says for mathematical studies SL (emphasis added):

@IBO

Mathematical studies SL—course details

[…]

The students most likely to select this course are those whose main interests lie outside the field of mathematics, and for many students this course will be their final experience of being taught formal mathematics. All parts of the syllabus have therefore been carefully selected to ensure that an approach starting from first principles can be used. As a consequence, students can use their own inherent, logical thinking skills and do not need to rely on standard algorithms and remembered formulae. Students likely to need mathematics for the achievement of further qualifications should be advised to consider an alternative mathematics course.

Mathematics SL and mathematics HL are intended for those students who want to continue taking more advanced math in college (HL is the more advanced course and is more likely to give advanced placement in college).

[ucbalumnus]

http://www.math.buffalo.edu/rur/rurci3.cgi may help you determine which precalculus topics you may need to self-study before taking calculus 1 in college (or if you need to take a precalculus course before taking calculus).