James started walking away from his house. He started 3 ft away from his front door. He then walked another unknown distance North or South. If North is represented positively and South is represented negatively, which function BEST represents how far James is away from his house? A) f(x) = |x| + 3
B) f(x) = |x - 3|
C) f(x) = x(-x) + 3
D) f(x) = 3x - (x - 3)