I see that you’ve uploaded a few images related to proving or disproving whether a quadrilateral with specific coordinates is a rectangle. Based on the provided information, here’s the approach we can take to answer the questions regarding the quadrilateral:

Given the coordinates of the points A(-3,1), B(4,8), C(7,5), and D(0,-2), we need to:

1. Find the midpoints of the diagonals.
2. Determine if the diagonals bisect.
3. Check the slopes of the sides to confirm if the quadrilateral has right angles.
4. Calculate the lengths of the sides and diagonals.
5. Check if the diagonals are congruent and the opposite sides are parallel.

Would you like to begin by calculating the midpoint of diagonal AC, or do you prefer to start with another aspect of the problem?