Answer: About 4 points should be below the trend line.
Step-by-step explanation: A Scatter Plot has points that shows the relationship between two sets of data.
A line of best fit or trend line is a straight line that best represents the data on a scatter plot.
This line may pass through some of the points, none of the points, or all of the points.
But its objective is to have the line as close as possible to all points, and as many points above the line as below.
As there are 4 points above the trend line, so there should be 4 points below that.