This is the first math class you have chosen to take. Until now, everything has been required. But you have moved beyond Algebra 2, the last required for graduation.
The expectation is that you are taking this class because you have a genuine interest in math. Maybe you have your sights on a career that is math-intensive. Maybe you just like math a lot and want to learn more.
Successful completion of this course should get you well prepared for success at the next level: Calculus.