Minnesota Blue Card Practice Test

Looking out the rear window while backing up is primarily important to avoid relying solely on mirrors, which can create blind spots and may not provide a full view of what's directly behind the vehicle. By physically turning to look out the rear window, you gain a comprehensive perspective of the area, allowing you to identify any obstacles, pedestrians, or other vehicles that might be in your path. This practice enhances your awareness of your surroundings and contributes to safer maneuvering while reversing.

The other choices offer less relevant reasons for this action. For instance, seeing how far you're going is not as effective since backing up is more about ensuring safety and awareness rather than distance; checking the weather is unrelated to the task of backing up; and while viewing surroundings is somewhat relevant, the primary reason involves the complete visibility assurance that comes from looking directly out the rear window.