Answer:
C
Explanation:
A scatterplot best fit line looks as thought the distance of the points above the line are the same as the points below the line in this case. See the comment under d for more.
A
All the points are above the line
B
Only a very few points come close to the line. Left right is more at work here rather than up and down.
C Answer
D
The average of those above the line might be the same as below the line, but the symmetry is a left right symmetry; all the downs are on the left and all the ups are on the right.. They might average out to be 0 but it is not what is meant. The x and y values both have something to do with the answer. D is the second best answer.