But if it is as x is approaching zero, and the question says that 6 is when x=0, why wouldn't it just be 6? There were a couple previous problems to this, stating as x approaches 0 (negative), and I knew that'd be 1, and when x approaches 0 (positive), that'd be 1 as well because of plugging it into where x is < or > than 0, but if it's just 0, why wouldn't it be 6?

because it's only 6 when x is EXACTLY zero, not when it approaches zero. The graph JUMPS to point 6 ONLY at x = 0, but it approaches 1 from the left and right.