Answer:
Connect the two centers to produce the trend line.
Explanation:
The divide-center method consists in dividen the data set into two equal groups. Then, we approximate the center of each group, each center would be represented as a point. Finally, we draw a straight line using those center points, that lins is the trend line of the data set.
Therefore, in order to use correctly the divide-center method, we must connect the two centers to produce the trend line.