Find the value of x rounded to the nearest tenth

Based on what i know about mean, this doesn't add up.

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box