Assuming that you mean New Bedford, MA, and that the graduation requirements are the same throughout the school district, you will have to pass three full-credit math courses to graduate. That generally means Algebra I & II and Geometry, though it's possible that Trig could substitute for Geometry if it's a full-credit course. Check with your guidance office to make sure.
As for becoming a Junior, it looks like you need to pass 6.0 credits each year to officially move on to the next grade level. So if you took 7 full-credit courses and passed 6 of them, you will officially be a Junior next year, but will still need to pass 3 credits of math total before graduation.
-Anonymous