Dan's teacher has given him two points, (2, 5) and (10, 3). Dan uses the formula (
x1 + x2
2
,
y1 + y2
2
) to get a third point, (6, 4). Now, Dan begins calculating the distance from (2, 5) to (6, 4).

What MIGHT Dan be using these processes to accomplish?
A) writing the equation of a line passing through all three points
B) calculating the area of the triangle formed by the three points
C) writing the equation of a circle passing through the two original points
D) calculating the slope and intercepts of the collinear points found using