It does fulfill a HS graduation requirement and shows up on HS transcript with the grade earned, but what I was also told is colleges like to see a math class taken every year. Don't know how true that is though.
This is twenty-five-year-old data, but I took Calculus AB and Calculus BC during my freshman and sophomore years of high school, and took Linear Algebra in the fall of my junior year, but because of scheduling difficulties, I didn't take any more math after that until I started college. It did not keep me from getting into MIT.
