Maria walks x yards in 15 minutes. If she continues to walk at the same average rate, how many more yards will she walk in the next 7 minutes?

This choice incorrectly represents the distance covered in 7 minutes. The expression suggests a calculation based on a fixed fraction of the total distance walked in a different context rather than the average rate. It does not take into account the correct time interval or the relationship between distance, rate, and time.

This option inaccurately adds a constant to the average rate, implying that Maria walks an extra 7 yards on top of her actual speed. The formula does not correctly reflect the relationship among distance, time, and rate, leading to a nonsensical result that does not represent her walking distance in the specified time frame.

This choice implies an incorrect average speed calculation by summing the total distance with 7 yards and then dividing by 15. This approach fails to represent the time correctly and distorts the relationship between distance and rate, leading to an erroneous average speed rather than the actual distance covered in the next 7 minutes.