Y=mx+b (A Parody)

Imagine a school in a chateau loaded with moving staircases, a game played on flying brooms, a shrewd wizard purpose on mastery, a normal kid who's the saint of an entire world he doesn't have even an inkling.
The Dark Lord, Polynomial, attempted to murder Y-Intercept when he was only an infant-yet he fizzled, slaughtering Y-Intercept's guardians yet abandoning him with a variable scar. After Polynomial's vanishing, Y-Intercept is sent to live with his dreadful auntie and uncle, far from any insight of enchantment. Be that as it may, at eleven years old, he is welcome to go to Algebra School of Algebra I and II, and an otherworldly world opens before him.