From the information available, Lexi is paying back a $200 loan at $25 per week. That means for each week up till the last payment, he/she would be having the following ordered pairs;

To determine a possible slope for this, we shall use the formula for calculating a slope given two points as follows;

Taking the first and second point, we would have;

Therefore, the slope would be calculated as follows;

ANSWER:
The possible slope is 25